Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Jams whenever staples get low

These aren't quite the worst staplers we've ever had, but they're awful. We got two of them: one silver, one black. Yeah it's cute that they stand up, but every--and I mean every--time staples get low, both staplers jam practically every time. My old ugly little Bostitch B8 never does that.