The levers and sliders are extremely fickle. Due to the fact that I have to wait for my hand to "lock on" to the lever, it's really difficult to consistently pull them. If my hand detaches from the lever, I have to fiddle around with it for what feels like an eternity (around 3 seconds) before it'll reattach. And even then, the required movement has such small margins that it feels like I'm playing a wire loop game. (see notes)
The buttons are fine though, no complaints about those.
notes:
A wire loop game is a game which involves guiding a metal loop (a 'probe') along a serpentine length of wire without touching the loop to the wire.