I'd wait until your warranty expires before replacing the casing.
It's cool, though, but it doesn't seem to have that glossiness the regular DSL casing has. It would be cool if the case had a way of sliding in printouts like the PSP Playgear case.
I've known about them for a while, there actually http://www.e-linksoft.net and I'm wanting to get that cool black, I cant stand the default shell and that glossyness doesnt suit me.