I did have an issue where the triggers (as apposed to the shoulder buttons) didn't swap colors, but I was able to use the keyboard for that. Also, I really like how the onscreen controls swap between showing keys and showing gamepad buttons based on what you last touched. Pretty slick.
My only other UI comment is that I expected to be able to "tab" or move my cursor over the whole UI instead of having to use one set of keys/buttons to swap styles, another for tabs, and yet another for colors. Yes that's slower, put we've been trained by other UIs that that should work.