I bought one for my fiancee, and I like it.
Pros: Night sights on all of them, incredibly smooth trigger, nice ergnomics, small for it's capacity (with the small grip module, it's very thin for a double stack).
Neutral: Will take some time to master trigger.
Cons: Comes with only 1 mag, trigger is very different from traditional DA/SA Sigs, limited choice on holsters right now.
When I bought it for her, I got her the small grip module as well. I can say their design was very, very thoughtful. It takes less than a minute to change out the grip sizes.
I let a friend of mine (he's a glock lover) shoot it and he enjoyed it as well. Both of us had no problem shooting roughly 3-4" groups at 15 yards off hand. This is my fiancee's first pistol and she's still jerking the trigger like crazy, which the P250 does not respond well to at all. Due to the length of pull, she shoots 6-12" low cause of her jerks.
Overall, it's a very nice pistol, I would recommend getting one.
Anything specific you want to know, that I didn't mention?