I had an early KP345PR--one without the "do not dry fire without a magazine" warning in the owners manual.
I put more than 500 rounds through it without a single failure to feed and only two failures to fire*. Like most Rugers, it always shot better than I can.
However (there's always a "however" isn't there?), I ended up selling it because I didn't like:
1. The very small movement of the decock/safety lever required to disable the action.
2. The badly (in my opinion) understrength decock/safety lever return spring.
3. Lack of a positive mechanical detent to hold the decock/safety lever in the off (fire) position.
4. The very fragile magazine safety mechanism. I could have "cleaned the slide" (removed the magazine safety), but I never got around to it.
5. The useless (but harmless) key lock mechanism.
*In both of the failure to fire instances, my handling of the pistol caused the decock/safety lever to move down slightly--just enough to disable the firing mechanism. Flicking the lever back up instantly restored the pistol to ready to fire condition. This vulnerability may have been unique to my P345, but I was very disconcerted by it.
The combination of all of the above did not provide the level of confidence that I need in a "serious business" pistol.
The current production P345DC (decocker) pistol would be okay as a defensive firearm providing the magazine safety is removed. As a large caliber plinker, any of the P345 models would be fine out of the box.
About twenty minutes ago I ordered a new P90DC from Davidson's as my replacement for the P345. I had considered getting a KP345DC, but decided that I would just be happier with the P90.
The experiences and preferences of others may differ. I hope that this helps.