I recently bought a new M&P Sport (my only non-wood stocked long gun) from a larger on- line retailer (yeah, I know, probably shouldn't have) and the barrel was scuffed when it arrived at my LGS. Because I had "accepted" the Sport the retailer considered it used and would not exchange. To be fair, the retailer disclosed that policy before I bought it. So, I sent the Sport to S&W under warranty without firing it. No problems with S&W. They paid for shipping both ways and replaced the entire upper. No questions asked. They probably could have said that I scuffed the barrel trying to mount some gizmo, but they just honored the warranty. +10 on S&W warranty as far as I'm concerned.

I also recently sent in my 686-1 for the bushing recall. Turn around was 10 days. They also massaged the cylinder release at no charge and thoroughly cleaned it after test firing. Another +10.