Just had my upgrade from CS3 today and been playing about with it for the last hour or so, and all I can say is what I said above.. So much better than CS3 in all sorts of ways, more stable for one thing, all the new things to do with images and I got a nifty bit of software for free with it too..
Well done Adobe on a terrific update..

Injustice will be avenged.
Cofiwch Dryweryn.