I own a 627 and it's easily one of the best firearms I have*
*= That's a bit of a loaded story.
First off, I don't like the 5" barrel on the Performance Center, I wanted a 4" and landed up with the 627 "Pro"
Right out of the box, the thing had a boogered barrel crown and good up rear sight. Back to S&W it went. They fixed the barrel crown and said the rear sight was "within spec".
The DA trigger was solid, but had a noticeable hang up at the end of the pull. I took it to a local smith who is a wiz with S&W revolver triggers and sure enough, the hand was slightly out of timing and was fighting the cylinder at the end of the trigger pull (the best way to test this is to do a trigger pull with the CYL open, if it is smooth the entire length, the timing is slightly off). Long story shot, I had him re-work the trigger. I now only run 38 special reloads through it. I also popped on a Burris FF III red dot. The revolver is a serious steel ringing machine now. SA trigger is so light, it's useless so I only shoot it DA.