Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DA 250A Porter-Cable finish nailer

I just purchased this nailer and have used it for about 50 nails so far. The hair-trigger is verrry touchy. Bumping delivers just one nail okay, but requires a good aim attaching casings to jambs. What gets cumbersome is the local unavailability of P-C finish nails. Another brand I am using jams badly. The manual is straight-forward in saying only P-C approved nails are going to work okay. I guess I'll try to get them via mail-order. The nails P-C provided with the gun worked flawlessly, so I will adjust to its finicky diet.