I had my phone charged this morning fully, and it went dead around 630pm, charging right now, It will give me usage data after this it says, but I'm assuming it won't show the data for how much usage I got out of that first initial charge.
But, I wasn't all that impressed with the battery overall. I didn't think that I was using the phone all that much, albeit it was more than my normal usage.
I am happy with it though, I was just expecting more.
Hopefully I get better useage once the battery is broken in.