I've got this one and I love it. The logo is ugly (but it rubs off) and the flash is messed up (but I modded mine with the old back from my original battery). I highly recommend it, the phone feels much more solid and the battery life is ridiculous. I can stream Pandora pretty much all day and talk as much as I like with no worries.
EDIT: For the mod, I just cut the ring around the flash/lens out of the back of the case of the original cover, superglued it to the back of the new back after sanding the recess down enough to compensate for the thickness of the ring, placed it properly so that it didn't cover up the flash or lens and then let it dry overnight. After it tried I took a dremel to it to flatten it a bit more and widen the hole for the lens (it was slightly off, causing a slight glare in one of the corners when I used the flash). I can post pictures of the result later if I have time.