I was disappointed in this...maybe because I had really high hopes for it! The adjustable vibration is good and it is strong and fairly quiet but the "rim" doesn't vibrate with the same intensity as the body of the unit. I felt it a bit awkward to hold. Given the opportunity, I would not buy it again...UNLESS it were more reasonably priced - say in the $50 range. Otherwise, the plastic has a nice feel to it, charging is easy, but the instructions for the controls were a bit ambiguous.