Got the phone on lauch day and so far the battery life seems amazing. I have used pocketPCs for over a decade and the last phone I had was a Touch Pro which I was lucky to get 4-6 hours battery life in standby. I live in a very low signal area all day and the TP would burn up quick.
I have been using the heck out of the Hero and easily get 12-14 hrs. I got my wife the Pre and I put her wifi on full time and she goes to work at 7:30 AM and when she goes to bed at 10PM it still has juice left. I did install the recent update on it so maybe that makes a difference. he is not a heavy user and is loving the pre, but the pre seems to have a terrible radio it drops a lot of calls where the hero will maintain the signal....
I wish the Hero had the same transflective screen as the Pre and Iphone, where even in direct sunlight you can see it almost as good as indoors. At least the Hero performs better than the TP in direct sunlight. The TP was impossible to see in direct sunlight.