The KP345 is similar in operation to my P95dc 9mm. The frame is a bit slimmer on the .45, mag release is different, and of course the "K" would have a stainless rather than blue slide. I got my P95dc used, have owned it just over a week and fired it today for the first time.
It was accurate enough, but I do not like the feel of the frame. It feels like the body of my Honda lawnmower, in all honesty. My gun functioned flawlessly, but I did not warm up to it at all. I have the following other handguns chambered in 9mm: Beretta 92F, S&W 908, Astra A75L, BHP, two HK P7 PSP's. Out of the seven, the Ruger is my least favorite. It isn't a concealed carry piece, and holsters aren't readily available on vendors shelves.
I got a co-worker a used Ruger P345 a week ago for less than half cost of a new one. He likes it, though it wasn't his first choice he opted to purchase two used handguns for the price of one new handgun. I haven't shot it yet, as he and I have different off days but I do want to try it.
Here is my Ruger P95dc 9mm.