I literally just received it, so I can't review its capacity...
However, I can confirm its fit is not perfect. It is slightly thicker than the stock battery, and this is enough to make the cover bulge on one side. I removed the red label and this allowed it to close enough for my taste. I could probably shave the cover to get a better fit, but eh, not worth the potential damage.
Note: removing the red label exposes a metal cover. More than likely this is not connected to any circuitry nor chemical in the battery so it should be safe to handle and use. However, if you are not comfortable with exposing a metal cover like this, then don't take the label off.
It came charged a little over half full. It's charging now, we'll find out tomorrow how well it works.
I went ahead and dumped a bad review on amazon for the poor fit. Others may not be as comfortable with modding things as I am.
HTC Incredible 2
CyanogenMod - Nightlies