Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: VERY DISAPPOINTING PRODUCT

I bought this jig to bore the passage sets on 9 doors for a job I was on. I've always depended on Porter Cable to supply me with pro quality tools. This is not even close to home owner quality. The supplied 2&1/8" forstner bit had almost no clearance ground onto the cutter. The result? Like trying to cut your way through a 2x4 with a butter knife! I had to hand file it on the job in order to even use it. The 1" self feed bit boring worked better, but is VERY aggressive. The self centering guide that it fits into doesn't center the bit, and won't necessarily guide it correctly either. I had one door I almost blew through the stile into a door panel because it went off at an angle. It was a very UNSATISFYING tool purchase, and very frustrating to use. When I pay this much for a tool, I expect it to work as advertised out of the box. The PC 511 doesn't deliver what it advertises.