Well with the first full charge of the extended battery, starting at 18:30 on the 28th, I had 28 hours with 10% before I started charging again.
There was a total of about 2.5 hours of talk, 3.5 of Hulu and internet TV, many text and emails, 100% on screen brightness during the day, and 8+ hours of sleep for me and more standby for the phone. This will definitely work for me while I'm on 12hr shift not worrying about getting to a plug.
We don't have 4g yet, but I should be fine when we do, I hope.
Just my experience for the day. Hopefully the battery will get better as it is conditioned.