Suffering from knee arthritis for several years, I have used pain killers and anti-inflammatory drugs to cope with the constant pain and stiffness in my knees. I have tried physio to build up the muscle around the joint but that doesn't relieve the downward pressure when standing or walking, or the stiffness when sitting for extended periods of time.I saw this massager advertised on social media so began to search and compare the various makes and models available. Ranging in price from less than £100 to over £300 I was skeptical when I saw this model but, with Amazon's returns policy I thought I'd give it a go.I have to say that so far I am really impressed with it. The massager arrived the next day after ordering, so I immediately gave it a go. Easy to use and with a full charge I strapped it on my painful aching knee and was instantly relieved of the discomfort.A 10-minute cycle on each knee gave me relief for several hours so I again used it while sitting down watching TV in the evening. Woke up the next morning with greatly reduced symptoms - little to no pain or stiffness when getting up out of bed. Another 10-minute session on each knee to see me through the day until the evening.Can't recommend this highly enough. No need to spend hundreds of pounds on other models - this does the job very well.