Been trying my friends iPhone with ios7 and I have to say its so much better in person, tbh the screenshots make it look a lot worse.
A few parts I didn't like but wouldn't be too difficult to change it, the overall UX is a big leap forward and I feel its more important that they got that right, there is a very clear direction and it just needs a bit of polish. The icons are a bit crap thou.
I think that, like many things, the art style is very different but it will grow on you. I'm starting to get used to it now, it is a tad on the bright side, but that's just because I'm using the brighter dynamic default wallpaper so can't really complain, the darker one would soon sort it.
The thing that totally looks horrendous to me (and would turn Steve Jobs insane) is the way they replaced the back menu button at the top left with just text. BIG text. Which then pushes the centre-aligned text further to the right. Looks totally naff.
On a brighter note, the new Mac Pro is very innovative (and looks almost exactly like a brabantia bin)
Fixed that for you.