Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Model 5700M - Worse Stapler I've Ever Owned

This ARROW Model 5700M stapler was brand new out of the box today. I started my insulation job and it jammed on the eighth staple. I had to dismantle the stapler to clear the jam. It then jammed again about every eight to ten staples. It appeared to be jamming because the stack of staples (ARROW T50 Heavy Duty - 1/2 inch) were cocking over in the chamber to a 45 degree angle. Another extremely annoying feature is that the staple stack is 4 inches long out of the box but this stapler will only accept a three inch long stack. After clearing jams about a dozen times it began to jam every third staple. At that point I quit the job, losing a day's work, and tossed it into the trash. I'll never buy another ARROW product again in this lifetime.