There are things I don't like but also a lot of things I do like. I'm not upset I updated from iOS 6 to 7 and I would do it again given the option.
Things I like, time stamp in message app. I like everything about control center and I use it very often. Multitasking screen (although I think it could be a little better), all sorts of features in settings (data usage per app, etc), camera app, camera roll (photos app), etc etc
I'm looking forward to iOS 7.1. I think a lot of my little gripes will be fixed from what I'm reading.