K9 is OK, but I found some things I didn't like about it and eventually sold it:
* It's somewhat heavy for its cartridge/capacity.
* The slide lock is poorly designed in that it's sharp, protrudes a lot ruining the slim width, and is angled the wrong direction for me.
* Using reloads will cause a trip to the gunsmith.
* Disassembly seems harder than it should be.
* The trigger is glock like, in that it's not double action only.
If you're going to get the 239, I'd recommend .40 or .357. It seems too big/heavy for a 9.