I ordered two of these batteries, one for my Incredible and one for my g/f's Eris, about 2 weeks ago.
Regardless of your stance on how you treat a Li-Ion battery or the "bump charge method", I charged the battery overnight til green w/ the phone off, took it off the charger in the morning for a few seconds and plugged it back in until it went green again. Then went about my business.
Seeing a definite bump in battery life w/ the 1500. No, I'm not going to go into details in this thread as far as %'s, time w/out a signal, up- and awake- times, etc. Yes, I realize all this plays a major role in battery life. I can def. get a couple more hrs a day w/ this battery (w/ my usage patterns/needs/habits/etc.). Simple as that. (My expectations going in were to get around 15% more life because of the extra 200 mah and I'm getting that easily).
So, I would say go for it. The transaction was fast and easy. I ordered the battery and had it in my phone w/in 3 days. Very fast delivery. The battery came in the clear plastic bag, as you guys mentioned, and looked brand new. (Bidallies does give a description of the battery in their listing. Look closely.)
I'm a satisfied customer. This is a great option for those of you looking to get improved battery life w/out sacrificing the sleek size of this phone (No, I have no experience w/ the Seidio; after reading this forum, I decided my $ would be better spent on the 1500 mah.) Are you gonna get 2 days out of this battery? Probably not (unless in paperweight mode). But, this allows me to get through a normal day easily (I did have one day w/ around 2 hrs of work calls and a lot of emailing, texting, and browsing attachments. Also, 45 mins-1 hr of Pandora. That taxed the battery and I actually went looking for a short charge late in the evening, but I still saw much better results than a heavy day w/ the stock 1300).
*BTW, my back cover snaps on just fine (yes, the battery is slightly larger; there is another thread on the forums showing the measured size difference). There are no gaps around the edges of my phone. Also, continue to do the "bump charge method" w/ this battery as well (as this is a phone issue and not a battery issue).
Just my 2, non-technical, pennies.