Bought the MK9 a month ago and just got the wood grips from Kahr today. Man do I love this gun! I've put 400 rounds through her without a hitch and it conceals so well. My previous carry was a Glock 26 which I sold--I don't miss it at all. The Garrity Gunleather holster is very comfortable. I've discovered, contrary to what I've read, that this is an excellent pocket gun too. I don't find it heavy at all. I use an Uncle Mikes pocket holster and I barely notice it.
Surprisingly the grips didn't fit because there wasn't enough wood cut away for the two bottom screw tabs. I had to remove about a 1/16" of wood with a chisel. Very easy to do but I really shouldn't have had to. I'd be curious to know if others have had the same problem.