I have an OnLive console, (yes, the stuffty streaming service that went bankrupt and got bought out [it was a gift don't judge]) and although the service is kinda meh and the console's not overall great, the controller is the best I've ever used
holy stuff man, it just feels so good. It's not original, but it perfectly blends the strengths of the XBox controller (form factor, responsiveness, triggers) with the strengths of the PS3 (symmetry, dPad)
edit: the only complaint about the controller I have is that the media playback buttons along the bottom don't get enough use, there's nothing really to use them for within the console
