Just came from iPhone 3G to the Bold. Yesterday was my first full day with this BlackBerry. I used the phone HARD all day (over 500 emails, over 1.5 hours of calls, lots of BlackBerry Messenger, SMS, web browsing) and it lasted from 8am until 11pm when I went to bed. The battery indicated was at 20% when I went to bed. I upgraded to the OS to .185 around 2pm in the afternoon yesterday as well.
My iPhone would have died by 1-2pm with that kind of usage. So happy I switched