------UPDATE-------
Ok, here's the latest concerning my 3500 mAh battery I got from ebay. First off, I immediately recognized the new battery door is much cheaper quality that the stock door (duh....it was 20 bucks). One of the small legs was broken from the inside edge of the door. It appears the legs are just glued into place and not a one piece design like stock. So to all the others, don't be surprised at the door quality. Luckily the ebay seller I bought from is super cool and he's sending me another door no problem. Also, the door does slip down loose every once and a while. Might be due to the bad leg...will wait for the new door and see if it gets better. ...
Now, on to the battery itself. I've had the battery for two days now, and managed to finish the calibration last night. The battery has had one full drain and full charge overnight. According to battery left, I am running at about 18h:36m battery life fully calibrated. This is under absolutley normal operating conditions, I have not been using my phone excessively at all (eg..wifi, gps, music, browser, apps, calls, etc.) I am not seeing the usage stats that blu posted earlier in the thread. I was expecting much more out of the battery than a days usage...but I cannot be to disappointed since I was only seeing about 7-8 hours life out of the stock battery. I can say I have effectively doubled my battery life with the 3500 batt.
I also noticed something else very interesting. Battery left is estimating my battery life much lower than my system is....somewhere in the neighborhood of 13%-20%. For example, right at this moment, BL is estimating my battery at 31% while my stock android system says 50% battery. Is anyone else having this issue? I have heard of the opposite occuring earlier in the thread, where the system estimates low but BL says much higher. If this keeps ocurring, I won't really need battery left on my phone since it is reading incorrect. Keep in mind it is fully calibrated.
Overall, I am satisfied with the battery. It was only 20 bucks with free shipping and the seller was easy to work with. I was hoping for a couple of days of battery life, but I;ll sure settle for one day. It is much better than what I was getting with stock........