Dan Moren reviews iOS 7 for Macworld:
So, kick back and relax. Pump some jams from iTunes Radio, fiddle around with Control Center, browse through your photos and relive some memories. Because iOS 7’s greatest triumph is making the familiar feel a little unfamiliar to us, affording us anew that joy of discovery and wonder—and you rarely get a chance to experience something again for the first time.
I’ve been using iOS 7 for three months while redesigning my company’s app. It took some time to adjust, but it was similar enough that the learning curve was minimal. Installing iOS 7 is as Moren describes - experiencing something familiar yet new. I think you’ll like it very much.