Picked up my 42 a couple of weeks ago and love it.
I use a Uncle Mikes IWB for the Glock 27 (#12) and is just the right size. Pinky extension feels great in my hands.
I have used the Ramora holster as well.
Shoots nice and very little recoile for me and I'm happy with my purchase.

I heard they are working on a 9mm in the same frame size, I'd like to see that as well.