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

i purchased 2 of these wheelchairs and within a month or so the nuts were falling off, the footrests were super floppy, the brakes were loose and the whole thing just felt loose and wobbly. I had a patient ask if they were put together with paperclips. I had to quit using them because they were just too dangerous.