Looking at the UI, I like it as well. It's quite a bit like Harmattan - and thus similar to Jolla and the new Blackberry OS. Which is a good thing - I find the iOS and Android UI's clumsy and counter-intuitive compared to the UI on the Nokia N9.
I look forward to seeing more of this phone - and hope it'll be more open than MeeGo was. That is, that the apps will be open, unlike on the N9.