Some of you may not be having problems but some of us are. My husband and I both have trouble with our iPhone 5, iOS 7 devices shutting down with 30% or even more battery life showing. Since this last update my phone has been terrible, I have to keep it plugged in pretty much all the time if I want to be sure it has any battery power when I need it.
I live 2 hours from the closest Apple store so a Genius Bar appointment isn't an option. I have called and the only thing they tell me to do is restore as new, but reading the forums tell me this might or might not work. I don't want to spend hours rearranging the hundreds of apps I have on my phone into folders because of this problem. My battery life on iOS 6 was great, never had a complaint. Now the phone is just annoying to use because I never know when it will decide to die. It is a problem, whether you believe it or not.