I got to try the P345 shortly after it came out in '04. I really wanted a 1911, so I bought that instead though.
My impression of the gun was definitely positive. I fired 150rds in it, and the gun functioned 100% reliable. Not a single feed/extract problem. Accuracy was Decent: At 15yds I got a whole mag under 2" (after practicing, and getting used to the trigger).
The trigger was nice, but I'm a Single-Action fan so it took me a while to get used to it. Instead I bought a Used Colt 1911 that day.
If I wasn's so partial to the 1911 Trigger I'd have bought one... For the price it was a decent gun though! Better than the big, clunky P97 I fired years ago...
I'd say check other Ruger Forums just incase, but I'd have few reservations buying one. The grip was much nicer than the other Ruger I fired!