I have it, it's pretty frame rate heavy.  You can see my PC stats in my sig, and it runs smoothly in most conditions, but from the VC the frame rate will drop to the 20's.  It's the G1000 that does it, I've noticed if you turn the high quality virtual cockpit option off in flight sim the frame rate improves significantly, but the screens become much less clear.  Useable, but not as pretty.