Today is my first day at work with the phone, and the battery is not holding up very well.
Currently at 24% 7h 12m 28s with just 1h 0m 2s of screen time. The cell reception in this building sucks, and it has been jumping from 3g to 1x to roaming all day, so that hurts. Still, my HTC One was often over 60-65% when I leave work.
I'm hoping the battery improves over the next several days. I've only had two charge cycles so far.