The short story is that NCPS is my favorite lab for "serious" shots due to the quality of their enhanced scans. I can still do a bit better job scanning myself if I spend some time with my trusty Nikon LS-5000 scanner, but for anything short of a large high quality print the NCPS scan is magnificent.
The above picture was taken at UCLA's Royce Hall and is an example of an NCPS scan. Aside from a basic contrast adjustment it is untouched from their file.
I do like The Darkroom for toy camera photos, especially for their sprocket hole scaning service. Their normal scans don't quite compare to NCPS's, but when opting for the sprocket option they seem to do a very high quality scan.
Lately I have sent most of my rolls to these two labs and seems to be quite comfortable using them. I do still send our View-Master rolls to Photoworks SF as they are closest to us and the turn-around for a "do not cut" and no scan job is faster that way.