these cases look cool, but the only problem I have with them is weight... I've never seen the one for MBA before but the one for Ipad makes it like 3 time heavier and much bigger (almost the size of 13inch MBP).. kinda defeats the point for me... but definetly looks cool...
Yeah, the case makes the overall footprint larger, but I like the overall look and protection they afford especially when traveling. I have the InvisibleShield stuff applied for daily protective duties where the case will be too large.
There is another maker of these things, DODOCase. They only have iPAD1/2, Kindle and BB Playbook (???!) binders. I ordered one for my iPAD 2.
They look like they may be slightly higher quality. I like the color ranges of the Dodo's better then the Quills.