The gameplay is cumbersome and needs work. The unit I received had already been opened. Ive been trying to remedy it by trying different settings. Still holding up great! Turns out there is a little fan or cooling mechanism that produces a very slight vibration. I also really appreciate the fact that WinBridge made the battery easily user replaceable though a door on the back - in a day when long term battery maintenance is not something manufacturers care to think about or even want you doing, this is a big thumbs up from me. These are the most comfy wedge I have owned to date. Turns off automatically when not in use. I plan to use for back power for my phone on trips or when the power goes out. I am 5?8?, 162 lbs with a 34? measurement for the belt.