Have any of you had a chance to look at one of these? I've been reading about them on the internet but haven't found one that I could look at yet. Is the grip noticably slimmer than the G21, or is there not that big of a difference?

I have the G21, and my brother has the SF. It is more comfortable if you like 1911 grips. I don't mind the G21 grip as I got pretty large hands. But my wife hates it. Definately going to be a personal thing.

I've handled one at several trade shows and I would have purchased one if I hadn't ordered a Taurus PT1911 stainless back in March (which is due for delivery next week, finally). I like the feel of the SF much better than the standard 21.