Instruct: Classify Amazon reviews into positive or negative sentiment
Query: poor quality control - buy a Senco

I purchased this tool based on rave reviews that I'd seen. I immediately had problems driving 5/8" brad - about 50% would misfire. I shot a couple of hundred into fir just to see if I could find out a workable technique. No luck.I returned the tool and got another which had even worse problems - the trigger leaked air and the drive plunger wouldn't retract. It would drive 5/8" brads OK but anything longer than 1" wouldn't go because the plunger wouldn't retract.I finally gave up and purchased a Senco FP25XP for a lot more money cause I didn't want to chance buying another dud from Bostitch. They need to fix their quality control problem.