FWIW, when I went for a CHL Instructors course in Austin several years back, turned out my neighbor at the motel was there for the same reason.
He was the with the FBI prison staff from up at Dallas (can't recall his name or title, but I still got his card at home, he was Director of firearms safety or something like that, for the whole system up there) and he "hated" the S&Ws. Said they had all their staff carring them and that after 2500 - 3000 rounds they began to come apart and that he was in the process of having them all replaced.
I could kick myself for getting rid of an old Model 59 I once owned, as it was a real collector item, but I hated the trigger on it, but this is all the info I know, other than the fella passing the info above was a nice guy and extremely competent, IMO.
Make mine a 1911 or a Glock,
Mike