From what I've heard, it's a compact single stack 9mm, which basically looks like a shrunken 226. They appear to be a bit rare nowadays. I never see them at gun shows, for instance.
It gets high marks from those that claim to be in the know, but I don't see much functional difference between it and the 239, other than cosmetic. I've never owned one, of course. Maybe my opinion would change if I ever shot or owned one.
I'd just like to find one and see what all the hype is about.
By the way, a local gun shop has one for $495. It appears to be a very nice little gun. It also goes by the designation P6. These were apparently German police guns. The Shotgun News has a dealer on the front page today that bought a bunch of the German trade-ins as well.
It appears to be a shrunken 226. Feels nice, good Sig-quality trigger. The handle feels a bit slimmer and longer than the 239, and overall balances out better than the 239, at least to me. A nice little compact pistol. Didn't get to shoot it, but it's a nice little piece to handle.
I think this is the first one that I've ever seen out in the wild.