Well I was planning to give it a quick bash and give my impressions but it seems I'll have to wait. I was uncertain about the change in structure (I kind of like the grid system and how it forced you to think) but based on impressions/reviews the new approach is good too, so I guess its just a different approach and requires you to strategise in a different way.
But it seems the team in Milano are celebrating the release:
(oh interesting, the twitter embed doesn't show multiple videos so you'll have to head to Twitter to see the second video he uploaded)