Since the public beta release, I've not used those other OSes anymore
I could say that it changed the way how I do things in the M$ world.
I only have them on VirtualBox to reproduce the problems posted in this forum and post solutions.
You just have to remember that it's a beta and should be prepared to row with the punches. Funny, even with XP and Vista released in full form, we still needed to row with the punches