What's so great about any high end 1911? Or any high end pistol for that matter? It's hard to say. With the Wilson your mostly paying for fit and finish. Every Wilson I've ever handled has had a fairly light and buttery smooth trigger, great slide to frame fit, and a wonderful slide to bushing to bbl fit as well. The gaps between all moving parts are usually a little tighter than your 1911 in general. You're also paying a bit of a premium for the name alone, as Wilson has become pretty prestegious in the 1911 world. Me, I'd prefer a Springfield done up by their in-house custome shop. But I'm a SA fan boy like that.
-Chris
-Chris