The Simply Rugged SD Pancake I bought for my SW638 & SW649 is a well-built bit of kit.
I don't use it that often, because:
1. It lacks cut-outs to allow for cross-draw. That was a mistake and I ought not to have settled. I find that when my shoulder(s) act up, I tote either AIWB with a 1911 or AOWB (Appendix OUTSIDE the Waist Band) with a J-frame using a crossdraw OWB holster.
2. J-frames in my SR SDP ride a noticeably deeper in the holster than in all my other J-frame holsters and maybe a _smidge_ deeper than what I see in y'alls. That makes it more difficult to draw, relative to other holsters. My J-frames all wear Crimson Trace LG-105 laser grips, which have dimensions similar to the old boot grips which end the bottom of the grip frame.