I have them - work fine - even with Saitek rudder pedals. First check in windows that the axes and buttons are all working OK. Then make sure nothing is duplicated - esp something like twisty stick and paddles on throttle.
(I use stick slider for pitch trim and throttle wheel for airbrakes/spoilers, and the small thumb stick for moving viewpoint about. My twisty axis has probs but there is no use for it - also no use for paddles (yet - ground steering maybe).