Happy w/ mine so far. Battery life is not as good as I hoped for - but I was hoping for a tablet-level battery life, hehe. Silly me. It is better than iPhone 4/4S, but that's really not a bragging point. Besides which my iPhone was 2 year old.
Having said that, I haven't managed to drain it yet since I got it. I charged it fully yesterday and have been using it to drain it completely. I am at 20% since then. It felt like going from 100% to 80% is much quicker than going from 40% to 20%, which is interesting and makes me wonder whether the system is reporting correct battery level. Or perhaps different CPU profiles are at work according to battery level.
It is definitely the fastest phone that I've had. The size feels just right and so slick that it feels like a premium device (which it is).
Edit: Here is how it went. I turned the navigation on to drain the battery at the end. 8% left.
Edit 2: Notice 65%~55% area where screen wasn't on. I was sleeping and eating and the phone wasn't used, but still ~1% of juice runs out every hour. WiFi tablets would show flat lines there.
Also, what does "Awake" mean? Can it
not be awake when screen is on?