I have 2 9400's... both have Carbon FIber QuickSnaps.... although I sanded, and painted 1 of them with AutoMotive paint for my wife.
Nothing better than a hot wife with a metallic pink 17" notebook.
They add just the right amount of "heft" to the notebook and protect the lid nicely. I much prefer the Quicksnaps to the Skins.
Just my opinion though.