I had a M500 in 4 inch, the only issue I had was that I underestimated the power of the 500 in a short barrel. The gun functioned flawlessly, and the fit and finish were excellent.After awhile the novelty kind of worn off, I might have kept it if it were 8 3/8". I had and still have a FA 454, that's a handful as well, but not quite as much as the 500.
Now I'm ready to buy a 627UDR, as soon as I can find one locally.
Admittedly I don't care for the placement of the IL, if they hid it under the grips it would be fine with me, and the MIM parts are moot. I have other guns with MIM and the triggers are sweet.

Edit: I forgot, duh! Bought 2 M442's, 2 M642'S, 1 M38-3, 1 M37-2 , the only one with an issue was a 642 where the frame cracked. S&W replaced it under warranty, in less than 10 days, even though I was not the original owner. The gun was about 12 yo.

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