All in all I'm really happy with it, coming from a Nexus 5. Is also weird picking up the N5 now and thinking that it's a really small phone...
Same with me. I moved from a Nexus 5 to a Nexus 6 and got used to the big screen very quickly. When I sold my Nexus 5 a few days later, I used it for a a minute to hard reset it and thought that it was ridiculously tiny. This means that my next phone will also have to be in the 6" range. No going back now...