Haven't tried Debian, but good to know. When I tried UNR, some of the function buttons didn't work (notably the one that turned off the wireless), and two-finger scrolling was really buggy feeling. I had similar problems with Easy Peasy.
Now that you mention it, my touchpad doesn't work right. (It is stuck in "absolute mode", not "relative mode".) I rarely use the mouse, though, so this isn't something that occurred to me to check.