I used one on my first machine and I have to say one thing, value for money can't be beat. It is essentially a usb trackball with enclosure and several buttons (enough to game with, and almost too many if you ask me) The only other thing about it that goes the same for their buttons and such. I would have to describe the action as clunky and a little cheap/loud. I then ended up getting a happ tb and it was like night and day. If you have 2 good conditioned units the happ seems to spin about 4 times longer then the xarcade.