So after a couple of weeks with it, I really like the phone. This is the first time I've put a case on a phone and I haven't decided 100% if I I'm going to keep it on or not. I'm used to it now so I'll probably just keep it on because the thinness makes the phone feel too fragile IMO.
iOS 8 out of the box was pretty buggy but the last update seems to have fixed a lot of quirks I had.
Overall I really like the phone but as someone who went from a 5S to a 6, this was just a bigger screen. I get that they don't expect people to upgrade their phone every year, but this really might be their worst upgrade ever IMO.
It's a great phone overall though. You wont be disappointed.