I just received my battery today in the mail and put it in ASAP and it had 60% juice and now I'm down to 8 percent.
I'm running CM 7.2 RC I have 2 hours 58 minutes of screen time running at 1200mhz max and 200mhz minimum, 4 email accounts syncing every half hour, facebook syncing every half hour, 42 minutes of web browsing, texting and 35 minutes of phone calls. Data has been on at all times as well. Miscellaneous gaming here and there as well, Draw Something free, Hanging with Friends, Angry Birds Rio.
The phone actually feels right now, not too skinny anymore and perfectly balanced, I am just trying to find a case for it that doesn't ruin it. Everyone in their right minds should buy this ASAP! It's definitely better than switching 1650mah batteries every so often. I think if I can get easily 2 days out of the stock battery, I wonder what the 2000mah one is capable of!
Plain and simple this battery is kick ass and well worth the price.