Installation was clean, even with making multiple partitions on HD, so I can install & test other OS's. No need for extra drivers at the moments.
One curiosity was the auto creation of a system partition, Something to research, and understand.
A bit of the usual ' where the hell is that' as with any new OS, but mostly appears a re-organisation of Vista, with layers of menus, which means you have to chose the correct root entry point.
Joined to the domain eventually, after finding way to system page. SBS200 joining mechanism via web page didn't work, but Vista was a mess in this area, and appears to use same extension.
So now it's installing other software, and attempting to use it in anger !
Watch this space