Welcome to the forum.
There were some issues with cylinders binding on the .357 SP101's about 9+ months ago. The barrel cylinder gap was a hair too tight. As far as I know that issue was quickly resolved and is no longer a problem. The SP101's I've seen lately have really tight lock up, spot on timing, proper b/c gap, and barrels that are true to the frame (canting was an issue a year or so back too). Your biggest problems will be A) Deciding which version to buy and B) Saving up for the next one you'll want.
Best Regards,
ADP3