Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Jams constantly

I've never encountered a staple gun that jams like this. The first time I used it, it jammed after about 20 staples. It jammed again after another 20 or so. The second time I used it, I got jams every 5 or 6 staples. That was about half an hour ago. It's now in the trash, and I used a hammer and nails to finish the job. Definitely would not recommend.