I think as a new buy, pro is okay value but as an upgrade I am not yet convinced. I also dont like the idea of pro and standard versions. It smells of a company trying to make an extra buck out of the customers instead of trying to give the customers the best value for money. This is the reason I got Carrara 3 because it was a great product with amazing features added and if this pace of development continued then it would be an amazing pro level application in no time at all. I really hope they are keeping the best fetures underwraps till the release date is near.