I upgraded from P4 to P6 as soon as it came out and am still trying to find time to learn to really use it. I think that P4 was more intuitive, in that it was relatively easy to figure out without being a rocket scientist. P6 seems like it will require a lot more time and reading to learn to use well. (Maybe I'm just intimidating myself.) That said, I'm really looking forward to being able to utilize all the neat aspects of P6. Even though I've barely scratched the surface, I'm glad I got it. Some of the work here has been amazing.