Instruct: Classify an Amazon review into positive or negative sentiment.
Query: bostitch cap nailer

I needed the cap nailer to do roofing paper and ice shield and later will do house wrap.the ice shield has a granular surface and after doing about 1k sq ft of roof the gun started to malfunction, I oil my nail guns every day / at first it wouldn't feed the caps I would have to use a small screw driver to get the caps in place. there was a 3 or 4 second delay between firings. not good for production work. I cleaned the gun with parts washer and blew it out with air. the cap feeder worked better but the staples would not fire. the gun hammer would stick.. to get the last tar paper down last night before today's snow I got out my old duofast 3/8 crown 18 gage stapler and we positioned the caps by hand and used the duofast. the $ 400 + i paid for gun staples caps shippin wasn't worth the problems. I own 15 nail-staple guns and the bosstitch is the worst one . I have worked in construction 20 + years.