I had a 4, and that was the first smartphone I ever had. I held out for a long time and was still using an old Nokia bar phone that had the 2-color screen. Damn thing was a tank and picked up reception everywhere.
That said, I thought the screen on the 5 was weird when I got it, but once you use if for a while, you won't want to go back to the old one because it will look squatty. The major difference to me was that it was much faster, just navigating around the operating system. The LTE is faster than my wifi sometimes.
As others have said, it does not take long to fully charge it up with the new cord. I did not have a bunch of gadgets and **** that took the old connector, so the change to the new cord did not bother me in that regard. One thing that did bother me about the new cord is that the phone comes with just one, and I like to have one for the office and in the car, but you're gonna pay $30 for each additional one at the moment, since the Chinese haven't quite figured out how to copy them yet and sell them for $3 on ebay. So I just carry my one charger around with me all day. Was a pain at first but I got used to it.
The maps **** has never malfunctioned on me. From media reports, you would think the maps are completely wrong but I have not had a problem. I do hate the new YouTube app but I've gotten used to it. The extra row of icons is nice I suppose but not that big a deal to me. The camera works much better than the 4 camera. Panorama is nice but I never use it.