I’ve had this massager for about three weeks. I use it almost daily and have only charged it once, so great battery life.
Really good variety in intensity between the different levels. I use it to recover from running. It’s great for relieving pain/soreness in calves and feet.
No issues with the power button like others have mentioned. I actually found that you can turn it off by just holding the power button for about two seconds (similar to how you turn it on) instead of cycling through all the intensity settings. Not sure why that wasn’t mentioned in the manual.