Looking at some of the reports out there, many of the customisation tools (control panel etc) are disabled in the preview, so I'm not sure I'll try it on my main PC; I might try and have a go with my laptop instead. I confess I've not played around at all with the 'Metro' interface so I remain to be convinced.
customisation tools working here, once you get to the desktop or hit the button that says "control panel" on that stupid "Metro" interface.
Methinks that they had better give the option to install Metro as it will drive people mad.