I bought this powerhouse of a massager on Oct 3, 2020, and in that time I've used it almost every day for my nerve pain and muscle tension.The crazy thing is that I set up an appointment to see a massage therapist this week, and as if this handheld massager was jealous or knew it was being replaced, it stop working! The timing of that is blowing my mind. The irony, right?!But this amazing massager has been a lifesaver for me, and despite it no longer working, I bought the same model. I just can't be without this little dynamo!I realize there's a newer model but when you find almost perfection, why change? I understand the newer model is slightly less powerful than this model.I will say however that in the two years that I've had this massager that the silicone handle came off (I didn't use it anyway) and it cracked on the handle, even though the Gorilla Glue that I used to fix it worked fine without any other issues.Sad that it died on me but I'm so grateful that it lasted this long. That being said, I bought a new exact massager and I'm so looking forward to having this little buddy give me the relief I've come to enjoy for so long.UPDATE: 1/26/20231. Well, I just sent back the newest one I purchase because of the same issues of the silicone handle easily sliding off, and the seems becoming loose and unstable. Even with multiple uses of crazy glue on the seams, it still is unsafe to use, plus it's now making a grinding noise when I use it. I bought this last unit in September of 2022.2. If the company who manufacturers these units could spot weld, or use stronger binding glue to keep the seams together, and make the silicone handle stay in place by adding a couple of nipples on the inside of the silicone sleeve that could insert into divets/small holes in the hard plastic handle assembly, that would likely solve the issues.3. That being said, I won't be buying any more of these massagers because it's just too much to deal with having to continually fix what should have been fixed on the manufacturer side in the first place. Quality control would go a long way in improving these massagers. It was great while it lasted but now I'm on a search to find a much better unit.UPDATE: 2/10/20231. Obviously in the last paragraph of my review above, I changed my mind because I couldn't find a better massager without paying hundreds of dollars. So, I bought another unit, the 4th one.2. Every time I get a new one, I always superglue the seams because they just have a way of coming apart. I tested the unit prior to adding the glue and could tell the seams were still moving when twisting the unit slightly with my hands.3. I have to say that I can see and feel the improvements in the silicone handle, now not sliding when using it more forcefully when massaging out the knots in my back and neck (awesome!)4. It just feels better when massaging, as if they increased the RPM, or something else, but a big improvement!5. When I grip the upper body of it - makes it easier to grip it.6. I noticed the change of the percussive screw head being smaller and the adapters that screw on are further away from the body than the later versions. Not sure why they did that, but so far it still feels as stable and safe as before.7. Overall, I really love this massager, and now, it's a much-improved massager over the last few that I previously bought from the company. Nothing that I've found compares in quality, strength, and price online.P.S. Great job everyone at Renpho for making such a great product and continually trying to improve it; can't say how much (a lot!) this massage has helped ease my pain. Thank you!