Looks impressive, but I just tried out the demo and it needs a lot of work. It wouldn't be worth a buy at this stage, honestly, because it's far from being as functional as it was in that promo video. The promo also contained some erroneous Spanish so that it would translate properly into English, which is a pretty sleazy move on the part of the creators.
But it's a very innovative idea, and it holds a lot promise, so I'm sure lots of improvements are on the way.