By pure chance today, I actually had the opportunity to put a few rounds through a 42. Although I'm still not a fan of .380, this little gun is actually much nicer than most other .380's Ive shot before.
It's about the same size as an LC380 or similar (didn't have anything nearby to check against), but the sights are MUCH better (though they use a slightly smaller version of Glock's "U" rear sight), as well as the trigger. There is very little felt recoil. Reminded me of a G17 shooting regular pressure ammo. I have large hands and could still get two fingers wrapped comfortably around the grip. It shot straight
For those that say they should have made it in 9mm. After seeing the gun, I don't think that would have been feasible with the frame and slide on this gun. It is tiny compared to any other Glock you've ever seen. Will I buy one? I just don't know yet. Locally, I saw one for sale last week for $415. But I'm not sure I want a .380. In a gun about that size, I'd really like a 9mm. But the distinct lack of recoil is really an amazing plus to this gun.
So who is this gun for?
Well, this ad ought to tell you that.
http://www.youtube.com/watch?feature=player_embedded&v=c1_ajGMp3mk
I'm not sexist or anything, but I think this gun would make an excellent purse carry gun, especially for those that might be a bit recoil sensitive. A smaller .380 is no fun to shoot (even for me who doesn't really mind recoil much). LCP, I'm looking at you! Basically, if you're a Glock person looking for a sub compact single stack for CC, that has low recoil, this might be the gun for you.
I'm more impressed with the gun than I thought I would be, but that round is still a turn off. I personally don't feel like investing in yet another caliber. I don't currently own a sub compact single stack anything, but I am certainly in the market as I'd like a "church" gun (one that is easy to conceal in my church clothes). As much as it pains me to say it as a Glock guy, I think I'd be more interested in an XDS in 9mm (especially with that 4" barrel) than the G42. Now, if they release a G43 single stack 9mm, I'll be all over that.
And to those mentioning the Glock 30S. Limited in appeal, maybe. But I want one still. I have yet to find one for sale locally, (with the exception of a LEO only "Blue Label" one I saw last February). I've been moving more towards the .45 end of the spectrum with my firearms, but am still carrying a G19 most of the time. If I could pick up a 30S, I think it'd be my next main carry gun...G19 would become a range queen.