Any opinions on Acesoft battery? topic

Normally batteries can't have any more juice than the OEM batteries without adding more thickness. So whenever I find batteries claiming to be "extended" yet the same size as the OEM battery, I get suspicious. Nevertheless, I'd like to know what others think.

http://www.ebay.com/itm/like/3910149...lpid=82&chn=ps

So? What do you all think? Is Acesoft a reliable company or is this all bull-poop?