Very nice. Thread about 10,000 1-1/2 inch staples through, maybe 5-10 proud staples and no jams. Sometimes the mechanism that determines what firing mode you're in seems to fail, and you manage to fire twice. However, I am usually picky. This is an awesome weapon. Incidentally, the top of the piston/actuator is now all metal and the air outlet is on the back next to the gun air hose connection. Don't underestimate how big this small improvement is. An old plastic deflector won't be damaged ifโฆ