I've played with it and, in my opinion, it sucks. Microsoft has ignored developers again and have done things for the "new user" which, in many cases, are going to create headaches for us here on the forums as we try to explain that what they put in is not a "best practice."
They have pretty much ignored the developers and they have made it so that it is going to be hard to upgrade a 2010 database to the next version.
My opinion only but this will show you how I feel -
I have upgraded, and played with, each new version and have come to be okay with them for the most part. I played with this one and stopped participating as a part of the technical preview for it when they told me that they weren't going to fix a really basic, flawed item (the Linked Table Manager) and, while I would have had enough posts to qualify easily for MVP again, I told them I didn't want it.
Anyway, I'm sure people will like many aspects of it. But it is not for me. I will not upgrade to that version until I have absolutely no alternative.