Nothing really to worry about. They are good guns. You might run across a recall S&W issued on these guns due to a single manufacturers .357 Magnum ammo that caused some problems. The ammo is no longer made so the problem really doesn't exist anymore. However, S&W will honor the recall and do some modifications to the hammer nose bushing and hammer nose if you want. Your gun may already have received the mod. Open the cylinder and look at the model number stamped in the yoke cut. If there is an M stamped over the model number, it has already been modified. If not, it's your call to have S&W do the mod. Personally, I would defer.