I've got a 915, which is a plain-jane version with a blued slide and aluminum frame (same internals as the 59xx).
Judging from reputation and the one I own, this is a fair deal. There was nothing 'wrong' with these guns, it was a very good design and I like them. I also own Beretta, Sig and CZ, and the S&W is comparable in terms of quality and function.
A stainless model will be heavy, but consider what you'd normally pay, even used, for a full stainless from one of those other brands. That's a solid price.