Installed it the other day and was quite pleased with it, I really like the dark colour scheme and I'm sure the character styles will come in handy.
I was however shocked by the RAM and scratch disk usage; having 6 sub 20mb PSDs open in CS5 used about 3GB of RAM and a similar amount of space on my scratch disk, in CS6 that is about 5GB of RAM when I first open the files and 11GB after about 30 minutes and taking up 20GB of space for the scratch disk.
I understand it's a beta but has anyone else experience this kind of RAM and scratch disk usage?