Early on it seemed like the lock was enough of a hassle that people on the Smith forum complained a lot. Then it got to the point that if you complained they would kick you off. The biggest issues I actually saw were the light weight guns, lightweight, 442, 642, airlite, 329, they could lock up during shooting. I haven't seen it so much with standard weight guns, but the problem is it's always in the back of your mind. S&W rolled over pretty easy for the Clintons and that never set too well with the folks. It really makes a nice looking gun, look like Junk. Tons of people avoid them for that reason alone. The prelock guns were the real collectibles. I believe S&W recognized a couple of the lighter guns 442, 642 were either enough of a problem that you could get them with or without the lock, but the non lock guns tend to be more difficult to find. Frankly what I suspect the non lock guns should be, I'll probably stay with the earlier prelock guns. The 629-4 was where they started beefing up the internal parts. I came to Alaska with a chrome 29-1 and it just didn't hold up. I had the gunsmith replace a couple of parts and I sold it. Back in those days, like now people loaded heavy loads with heavy bullets. It's only been the last several years that I figured out most game isn't bullet proof. I still prefer the Rugers. I've had the Mountain lights, but frankly I don't care for the muzzle flip, so I haven't got excited.