Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Piece of Crap

I wouldn't wish this belt sander on my worst enemy. I bought one and the dust collector plugged up in a couple of hours. Shortly after that the thing stopped working entirely. I brought it back to the store and they let me exchange it for a new one, which plugged up even faster. I can't figure out how to unjam the dust collector without taking the whole thing apart. While it was working, it was nearly impossible to keep the belt straight, it wanders in and out like crazy.