The pedal on the set we had in my dorm snapped something at the hinge, close to the base. It still went up and down fairly well, but the game wouldn't recognize any input so we had to order a free replacement. By the end of the year it was close to going out, but it was mostly just my roommate and me playing by then and we're both calm enough players that it probably would have lasted quite a while under our care.
The pads, though, were another story. Some of the idiots we let play hit the red and yellow (since, you know, those are the most common notes on easy and they weren't coordinated enough to play anything harder) so hard they might as well have pounded their fists, and now something with the sensor on those two is touchy so it can't recognize quick drum rolls any more. This wouldn't be a problem on the blue or green pads, but red is where all the rolls are.