I like my SP101, it is a 3" 357Mag. I put in the next lower rated Wolf spring though, I forget, I want to say it's a 14lb hammer spring stock, and the heaviest spring in the Wolf package is like 11lb. I didn't want to go too light and risk light primer strikes, but since I also own an LCR I couldn't stand the dramatic difference--this one change made the two triggers much closer.
I did find I needed to do a detailed stripping on mine, it had some dried up goop on the yoke. Videos on youtube show how to do it though. Breaks down easily, and boy did it feel better once it was clean.
I don't like shooting magnums in it, but 38 +P is fine. Good gun. I got the chance to shoot the 327Mag version, and that is a version sometimes I think I'd like to have also--sometimes 5 shots doesn't seem like enough.