Last night I installed iOS 7 on my iPhone 5. It took about three hours as apparently everyone else was downloading it too. So far it's pretty nice. It will take me a bit to get used to the look but already Control Center is a big win. The camera is faster, background updating of apps will be nice, the calendar is much nicer and Siri seems improved. While I like that folders now have pages, my biggest complaint is that each page shows 3x3 icons instead of 4x3). I'm going to have to spend some time reorganizing my icons (but it's my fault, I have too many apps installed).
MacWorld has a good overall review, iOS 7 review: Radical redesign is more than skin-deep and The Verge has The best hidden features in iOS 7.
Update: 12 New and Hidden Settings in iOS 7.
- A Few Points on iOS 7,
- iOS 7, thoroughly reviewed by Ars Technica is six pages
- iOS 7 Review and Guide by Everything iCafe is a nice overview of most things.
- First Impressions of iOS 7 for Keyboard Power Users has some cautions if you use an iPad with an external keyboard