So I have been working with iOS 7 this week and my first thoughts are I like it mostly.
There are a few things that bother me about it (such as the ugly icons which will be changed), the animations are quite slow, and I have found quite a few bugs.
with that said I am enjoying the new look and I am really enjoying redesigning our app to match the new style. There are lots of little animations and features that make me like it.
I do know this is only a Beta version and that it will be better when they release the fully baked version later this year.
Overall I give iOS 7 an 8/10.