Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does not power off USB

My only disappointment is that (my own fault) I assumed that like similar products from other companies, this was powered by the Wii's USB port(s). I was unhappily surprised to find that it requires an AC outlet, which unfortunately doesn't work well for me in the place I have the Wii (getting power to the Wii was bad enough).I'll probably buy one of the USB based ones instead. :(The rubber grips are cool, though.