OH, it looks alright.
Some of the stuff that seemed to not work before seems to work fine now (the People app comes to mind).
But you can't maximize the start menu on the fly any more. You can still resize it vertically and you can choose to have it "Full Size" from the personalization / start, settings (while in desktop, which I suppose is a nod to mobile devices and two in ones) and may make some people who were missing the old Windows 8 Start Screen.
My main and actually only gripe (on the clean install), is the way that the shortcuts from my applications (like word, excel, outlook, etc.,) that I choose to "pin to start" do not seem to render there, in the same quality that the native tiles seem to.
I tried deleting iconcache.db and...