T feels that nexus 6p has been able to live up to its name. and has become a true premium phone. It has great camera and an overall great display though not as good as you will find on the note5 or s6edge, sgedge+ it is still a lot better than many other flagships.
It is great that it is supporting fast charging and has been able implement new technologies such as usb type c. For nexus I think the only thing manufactures need to work on is performance and display. for e.g. there is no harm in using 4gb ram or make a qhd display. Overall its a great phone and according to me is truly a flagship.