I moved to the Nexus 6 after owning a Nexus 5 for a year, the phone is huge compared to the Nexus 5 but the AMOLED screen is much better.
6 inches are very helpful and it is much easier to type with both hands, but the phone is very large and wide and will not fit comfortably in the hand of everyone.
Battery life is very good, similar to the Nexus 5 a little better what is surprising because of the large screen and faster hardware.
Fantastic cell phone Overall, highly recommended!