You should've named this topic The Mac App Store, Typo. When I first read this i didn't even know they'd done such a thing and thought "apple app store, yeah and?" Makes sense that they would. But nothing happens when I touch the monitor...
Well the top bar makes no sense. Not only is it different from all other apps, it just doesn't look right.
The interface itself looks ok; it has that Apple feel to it, but it doesn't have that finished touch that the iTunes store has.
Concerning the apps itself I can't quite make a judgement myself yet, but I've already read a few blog posts and even a dedicated tumblog to poorly designed apps featured in the store.
All in all, I prefer Bodega, which after all has been around for quite a while now.