Well I bought P5 not long after it's release, and I've not had many problems with the over all running of it. The only major one I had was the Firefly engine crashing but a reduction in the bucket size has solved that issue. I'm running an XP 2400 with WinXP Pro and it's behaves itself pretty well - teh Gig for RAM helps too. Overall I'm very happy with P5, I've yet to have any serious problems with it, granted I'm still learning how to really get the best out of it. Others may be in a better position to give a more definitive response, but that's my opinion :o)