It's the kind of material that's 100% sure to get hairline scratches. Haven't worried about it at all.
Reminds me of my first gen ipod touch that's whole back was same kind of polished metal. You could not tell what the backplate was made of after month of use, as it was one big mess of scratches.


There's no difference between 16GB and 64, nothing that you can see by naked eye at least.