This is a great device with many positives, and very few negatives.I work in a call center sitting all day, and I get a very tight knotted muscle pain running up and down the left side of my spine and into my neck and shoulder, a pain that often makes it very difficult to sleep or relax. I have tried many things ranging from expensive 1hr and 2hr deep tissue trigger point massages, cheap vibrating back massage devices and rolling shiatsu massage chairs, chiropractic adjustments and tens unit devices. I have tried most over the counter medicines and quite a few holistic herbs to relieve inflammation and nothing has worked long enough to make it worth the high cost.Once I got married I could no longer afford weekly chiropractic visits or monthly massages. (which only kept the pain under control but did not eliminate it)I started looking online and read tons of reviews. Finally it came down to two devices, this one and the Thumper Percussive massager. The Jeanie Rub looked exactly like something an old chiropractor had once used on me, and I recalled it had relieved my pain for a couple of days. Ultimately I went ahead and settled on purchasing the variable speed model. I admittedly felt a tinge uneasy about the high price tag, but still felt hopeful that it would be worth the high price if it worked. It would be an investment if I no longer had to spend 120+ a month for massage and chiropractic visits. I was still very skeptical.The device came on time (next day) and I tore it open and examined it. It was heavier and bigger than I had imagined, but solid and well built. I hurriedly plugged it in and turned on the dial switch. The device began to rotate in a way that my wife compares to a car buffer. I first tried it on my leg, then on my brothers back then finally on my back. My back sank into heavenly bliss.Unlike other massage machines this really had the power to sink in to my stiff muscles and go "deep" enough. I felt my muscles relax almost immediately. This machine has a ton of power. Normally I require deep tissue with tons of heavy pressure, but the oscillating 4200RPM action gets in deep without applying much pressure. I was soon glad that I got the variable speed model, as I found the fastest speeds worked great for me, while most others preferred the lower RPM speeds. I love showing people the jeanie when they come over, it's so unique. When using this device on me, my three brothers, and most others, the initial reaction you get is a deep relaxing "aaahhhhh" as your muscles melt and your cares drift away. " I want one," and "thats awesome" are very common responsesThe best part about having this device is that it works consistently when I need it, and within about 10 or 15 minutes I am pain free lasting for about a day or two.I soon found myself asking "what else can this "Jeanie" rub?" Now, I use it on my head for a scalp massage. I have used it on my face and jaw when I had jaw muscles locking up, on my legs abs and chest and feet (very nice on feet), and just about everywhere else you can think of. Anywhere that you want to feel deep vibrating relaxing pleasure.The more I use it, the better I get at picking the right speed and using the right pressure and movement techniques for the best overall feel.Now, I will mention the few negatives I can think of.The device can make your back feel itchy after about 10 minutes of use. I had to use it a while to get used to it. Like a really bad almost unbearable itch. My wife really hated it at first, and only after a while was I able to convince her to use it long enough to get past the itching feeling. (my guess is it has something to do with blood rushing to the back area) Even now she does not like this nearly as much as I do. Most the guys that have tried it on have liked it. (I personally feel like the itching is a small price to pay in order to have my back pain relieved, and found the itching goes away the more you use it)Also it is big, and pretty heavy. I would probably use it twice every day (in the morning to loosen up and at night to relax) but it to hard to use it on yourself, (when working on the back) so someone else will need to use it on you. I took it on vacation with me in my checked baggage, the TSA must have thought it looked suspicious because they searched my bag.Also my wife really doesn't like the vibrating feeling it produces, it bothers her hands, so she doesn't enjoy using it on me and I feel kind of guilty when I ask her to use it on me. (my wife is one of the few people who had this complaint)Ultimately this device has helped a lot, and in my opinion was worth the high price tag. I have not been to the chiropractor once since getting this device. I am still interested in saving up for the Thumper Massager, as I am hoping it will be something I can use on myself without assistance. I am also hoping that my wife will like it better than she like this.My physical therapist uses this exact machine on my body during my visits. I decided to get my own for parts of my body that I could help with. It’s made such a tremendous difference. Anyone with any type of aches and pains would benefit from it. Get it and try it and he will be thrilled! I adore mine!The product is exactly as described and received my order on time. I used it right away. Thank youAll I need is pink smoke and Barbara Eden to use this machine on me to make it any better. I'll give you a little back ground to start. I come from a family where most of its members are on the "fluffy" side of the weight scale. Given that genetic predisposition, my mother had surgery on her spine for a herniated disk. My sister has battled with a bulging disk problem for years and now I finally have been having some issues in the lower back region that don't seem to want to go away simply with chiropractic treatments. My chiropractor and my allopathic physician both said that the Sciatic pain was worthy of pain killers, anti-inflammatory, muscle relaxers and a round of steroids to help get me past the worst of my issues.Now that you have a basis of my situation I want to tell you that there were three things that saved me and my sanity. The first thing was my temper-pedic mattress and finding supportive ways to sleep. Before I was on the pain meds, that was the only place that I could find that was relatively pain free. The second is the McKenzie method. For those of you that aren't familiar and do Yoga, it's like the Sun Salutation position and for those that are Yoga Savvy; it's like doing a push up but leaving everything from your pelvis to your feet flat on the ground while looking up at the ceiling. The third thing was my Jeanie Rub Massager. This thing is SICK!!!!! (The good kind of sick). HOLY COW! Praise whatever god you prefer and sing it to the heavens, nirvana, Valhalla, etc.I got the variable speed model with the posts because I'm open to the idea of getting the attachments and to those of you that are debating on whether or not get the single speed or the variable. Get the variable. The few extra dollars is really important depending on which part of the body you are working on. For all those skinny folks out there, the boney areas are a little sensitive to the higher speeds. Now when you are working the thighs, bum and legs, crank that beast up to 11. Personally I like it on high the whole time, but many of the people I've used it on prefer variation depending on the area.I had been suffering for about 6 weeks by the time I got my Jeanie Rub Massager. I ordered it right before I attended an event in Atlanta over Labor Day weekend (Dragon*Con). For those that have not attended this convention, it takes place over four days and Five downtown Atlanta Hotels. It hosts around 40is thousand people and gets bigger every year. It caters largely to the science fiction and fantasy folks, but it has something from most areas of popular culture. This is the type of event that will have you up at 7 or 8 in the morning to get in line for your 10 AM panel and will keep you on your feet until well past midnight. As you might expect a person that is suffering from severe sciatic pain and has not had any pain killers yet, this would be challenging especially when you are toting a heavy camera bag/day supplies around with you for the whole event. When I got back to the hotel, I was almost to the point where I had to drag myself into my room with my tongue (because that was the only part of me that didn't scream with pain). One of the main things that drove me back to my hotel room, rather than sleeping on the streets of downtown Atlanta, was the promise of my Jeanie Rub Massager. I went to this event with my best friend and my sister. We took turns using the machine on each other and I tell you the people in the next room probably thought we were having some serious Ménage-A-Tois action every night. We were moaning with such pleasure, it would probably sound obscene to the passerby of our hotel room.*** Update It's been about 10/11 weeks since I've had the Jeanie Rub Massager and I'm soooooo much better. I can't give all of the credit to this machine, but it certainly helped me through some of the worst parts. I still have some sciatic pain, but the pain is much more localized in my upper butt cheek and having a session this little baby just makes the whole day better. Anyone that looks at the price tag and cringes at spending this much on a massager, believe me I can sympathize. I bought this machine when I was unemployed and had very little discretionary income. I needed a miracle and I think I found the best mechanized miracle money can buy. Go ahead and get it. You really won't regret it.This massager was referred to my husband by his chiropractor, he used the same one in his office and I ordered it on the spot. Worth the money, easy to use, basically it does all the work, you just hold it on the spot, it does make the skin red and itchy if on the same spot for too long, but that’s normal with blood circulation. Enjoy!We love the back massager it really feels greatI had been thinking of purchasing this for several months but just kept putting it off. Now that I have I keep kicking myself for waiting so long. Use it 3 to 4 times a day for about 10 minutes each time. It’s only been 2 weeks but it’s great,Circulation is primary for pain relief. Fastest way to to bring circulation to the surface with this product. Should have gotten this one years agoWe purchased one of these back around 1992 from a local Chiropractor who used them on his patients and sold them to us as well. It was a single speed and this little machine was used almost daily on sore backs, arms, hands and legs right up until about a month ago when it finally died. We have just purchased our second one here on Amazon and this one is even more powerful than the first one. We love the variable speed and the extra long power cord. If you want a powerful machine and one that lasts a LONG time, this is it! I HIGHLY recommend the Jeanie Rub!!!Un vibro masseur idéal. Tous devraient en possédé un. Le seul hic c'est qu'il vous faut un partenaire dévoué! Si ce n'est pas votre problême, n'hésitez pas. Des années de bien-être! À deux!Mon chiro a le même et quand je lui ai dit le prix que j'avais payé il était surpris, il a payé le sien le double.It operates more like a ‘sander’ and vibrates the heck out of the operators hands and wrists.Great machine. Has a small burning smell and hard to hang on at top speed, but relieves muscle soreness