I recently bought one used and had trouble with the laser. It seemed some solvent got on the lens from the previous owner. It affected the brightness of the laser in daylight.
I sent the laser back to Smith and they replaced it within 2 weeks. When I clean it I put a piece of tape over the lens or remove the laser completely. Not hard to clean such a short barrel.
I love the gun. It is a great pocket piece. The cylinder latch doesn't bother me. It is fairly accurate at short distances. I reload for practice but use Speer Gold Dots for carry.
Good luck with yours.