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 if you drop it (or if you inevitably use it as a hammer), and you'll never spray a jet of sawdust-filled air in your face. Finally, the belt loop must have a double acting release mechanism as the single loop can be inadvertently activated and disconnected by a hammer loop or other tool. Has happened to me twice.