Don't use it in an office chair or anywhere you intend to leave it!
The massage and motion and quality of this pad are excellent, but I will be returning mine for something different for one reason: the shiatsu balls have a "zero" position they always return to when turned off and the top ones stick out FAR and jab your back when it's not in use. If they retracted a bit (the cushion has enough room to engineer this) or if I could just stop the balls higher up and they'd stay there when I power it off so they aren't resting painfully against my spine, then this chair cushion would be a 5 star product EASILY. As it is though, I can't accept a massage chair that causes back discomfort.
Rating: 3 stars