I've had a 2.75" m66 for about a year now, and have carried it and shot it quite a bit. It has been excellent, and has exhibited none of the QC issues that I read it may have. I do think of it more as a .38+P gun, as the Pachmayr Compac Pro grips I have on it are pretty awful to shoot with magnum loads but conceal well for me.
I also have a recently acquired WC GP100, the matte blue model. The trigger is pretty awful currently, heavy and gritty, so I guess I'll have to get inside and see if cleaning and polishing some surfaces make a significant difference, and shoot the heck out of it. The trigger on my 66 is much better.
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