That sucker doesn't die easy (at least for me) is what I found out.
I charged it to full, unplugged it and then used it a TON. More than I really needed to use it, in fact.
The battery took 3 days, 2 hours and 11 minutes before the phone shut down on me. This, to me, makes it WELL worth the $50 I paid for it at the Verizon Store and also makes it something I'd recommend to anyone on the fence about actually shelling out cash for it.
Anyone else having good results? Keep in mind I have had the battery like 3 weeks now. I completed this test last night at 7:48PM (when the phone shut itself down).
On a related note... it took a few hours to charge back to full.