I am really liking 7.1. For the first time since the week the iPhone 5S went on sale, Touch ID works. It used to work only about 1/4 of the time. I had completely stopped using it. Now it works every time, using the same old, stored fingerprint data. Thank you Apple.
I did go to the store and return the phone. The new one has the same problem, called "Touch ID fade" that supposedly 7.1 will fix. I even programmed all 5 slots with the same finger, but it didn't help. After a week or so the ability of iOS 7.0x to recognize a print starts fading away.