It is nothing but a Hi-Power (GP-35) with the various "upgrades" that are common in the type already installed. That is not a knock on them, I like the Hi-Power. The SA looks identical to the Portuguese variant I just sold that I put the upgrades (hammer, safety, trigger, sights) into. I wonder if the SA has removed the mag disconnect which is the most common "upgrade" many people do to their Hi-Powers.
I will pick one up for the sub $700 price tag just to get a good look at it. I like SA 1911s and it will be interesting to see the build quality in these.
Chris