This seems like a thinner version of a PGP, but for DSL. Nice, clear, and seemeingly strong plastic. If anything, this should defenetly protect DS from scratches and possibly lighter falls. You have full access to all switches and places so it doesn't interfere with use at all. On a side note you can stick custom pics under it just like PGP and have a fake-skinned DS.
Check it out, might be worth it instead of a bulky case.