While I prefer a .45 for self defense and daily carry, I don't dispute the pros of having a very compact weapon. Trying to come onto the scene with something that lots of other guns already have is difficult, especially at that price range.
Personally I'll probably pick up a kahr as a backup rig in addition to a daily carry .45. The availability and reliability of them has been proven and the diversity of the 9mm round is what sells me on it. while the ballistics between a .380 and 9mm are similar, I believe a 9mm is more useful.
And personally I feel that the whole +P issue has become overblown. I don't dispute that the extra pressure is nice, it's not really necessary when going against an unprotected soft target.