As I've posted on this forum before, my biggest complaint was the seats, so I have to agree with Mr. Richardson there. Anyone who puts a performance aftermarket wheel/tire combo on their Cube will immediately know what I'm talking about - while the car will handle much better, the seat refuses to hold you in place.
I'm on the hunt for Sentra SE-R seats, but in the meantime my bolster modification has done wonders for more spirited driving.
Check out post 5 and 6 in this thread:
Cube Seat Donations!!!