I guess I have to be the one to be the downer here. I had phenomenal battery life with my iPad1. I never had to worry about it. I could use it to my hearts content and by the end of the day I never dropped below 35%, though I did charge at the end of every day). With my iPad2, I am getting down much further. For example yesterday, I watched one movie, did some reading on Flipboard, read on the bus using Kindle, read the Daily during the morning, and in the evening I played a few levels of Rise of Atlantis. This would have been typical usage on my iPad1 and I might have gotten down to 45% on such usage, maybe, on the old iPad. On this one, I got to 22%. Now that may not quite be 0% true, but the pace at which the power meter was going down was enough for me to hold back on how much I used it yesterday.
So I have to say that so far, the battery life has been my iPad2's biggest weakness so far.