I never looked for it in the stores, I just read a bunch of online reviews and checked out some peoples vids on YouTube.

edit: After some use, the only thing I don't like about it... the spot where your thumb rests under the buttons on the side, is glass smooth. So smooth it's slippery and makes picking it up odd. Also is so smooth it feels like it's greasy, but I just washed my hands 2 times to make sure it's not.