After owning all versions of the iPhone - will be holding off on the 5S. Apple really needs a drastic re-design/interface change and larger screen. I love my iPhone but come on already. Anyone that denies it is just lying to themselves at this point. I prefer not to switch to Android but what other option is there?
iOS - the same since it first came out and it's showing it's age.
Why would you need a 5S if you already own a 5? I think 5S is targeted at people who own a 4 or earlier models and skipped 5.
5 to 5S evolution is not as dramatic as 4 to 4S, unless the A7 CPU is a quad-core cortex-A15.