I have one. Couldn't be happier with it. Cleaned it and put noalox on the threads right after I got it... threads are precise and smooth, button is smooth and locking ring works great. No obvious cosmetic defects, finish is uniformly good. Fit and precision of all metal parts is great. No problems with battery fitment, everything works as it should. Only complaint: the floating 510 pin in the head is difficult to move, but it does move.