I've had it 4 days and the battery life is pretty bad if i'm honest.
I used to be OK with my last phone (nexus 4) as i wireless charged it everywhere (like sat at my desk at work id drop it on the pad between using it etc..), because i now have to plug it in i don't bother when i know ill need it again in 5 mins, and it barely lasts till 4pm.. I had to charge at 2pm yesterday.
Yes it charges fast.. and I only need to plug it in once.. but I do need to plug it in and that's a problem.
I'm talking real world use here BTW.. not screen on time or whatever people are measuring. I could my phones battery in terms of getting up at 6AM and being able to work a full day in the office with it, and still make it home without it dying.
HOWEVER.... I am using it more as its new.. so i think my usage needs to settle done to normal levels now before i make judgement, as the wow/shiny/new factor means i keep touching it when i normally wouldn't have.