Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Drive mechanism is junk

Out first unit lasted about a month, then the paddle stopped turning. This was returned to the store. The second unit did a little better, it lasted well over a year of twice-weekly use before the paddle stopped turning. I took it apart (not too easy, they used tamper resistance screws to hide the shoddy design) to find the problem. The problem is simple, the large pulley that turns the paddle is plastic and cracked and broke where it meet the paddle shaft. Really a piece of junk! Be nice if I could find replacement parts online.Other than that, it was a decent machine.