Top critical review
You'll Have to Keep Taking it Off
Reviewed in the United States on December 18, 2018
Mechanically it works well for most part. Although the top part doesn't stay in place. But the worst problem (and I may end up returning mine of this reason) is when it is done the balls park themselves on the bottom and it will literally eat into your back unless you take it off your chair every time and put it back on every time you want to use it.