Well first off I've read a bunch of interweb stuff about Sig and the P250 etc. Lets put all that aside and allow me to share my P250 compact 9 mm experience.
I've run 400 rounds through my P250 with zero problems. 250 UMC and 150 WWB. Combat accuracy was obtained for the first 250 rounds, and groups tightened for the last 150 rounds. I was shooting 9/10 rings on a B27 target at 7 yards.
The DAO trigger is very smooth and is enjoyable to me, as I am used to shooting wheelguns.
The only oddity for me is I am not able to do the typical chamber check by slightly pulling the slide back to see brass. The hammer spring(s) tension make me eject the round. Hence loading of a magazine from slide lock, or the mag fed carbine check is appropriate (i.e. mag with brass at the 15 round mark, rack, remove mag and see no brass at the 15 round hole).
The P250 concept is really neat. Stamped frame, interchangeable grips, slides etc. But what is really neat is 35 total parts (not including mag).
So far my opinion is two thumbs up!