I have one ... and it's now in the closet. With the my CH FighterStick, the CH Throttle, and the CH Rudder pedals - and given that you cannot use analog controls for trims as I'd intended - I didn't really have a use for it as I'd envisioned, and given that I'm using the buttons on the regular throttle for up, down and voice transmit I found it very awkward to use the buttons on the quadrant for much of anything.
Maybe if I was flying 4 engine bombers more... but then again, about the only time I ever want to control engines separately is taxiing, or if one gets kilt, and I can what I need to do in either instance with a few simple keystrokes.
But there's nothing wrong with it, or how it works.