The second link I posted is not a sleeve, it's a folding cover that holds it in place with straps, has a pouch on outside that keeps your headphones/adapter/usb cable in it.
Inside of case is lined with memory foam so it won't put pressure on the 5way like 90% of the "book" covers do.
If you follow
this link you can see the pictures of what it looks like inside >>
only thing that may be irritating is the straps on the top/bottom that may cover ther keypad/corners, I'll see how bad it is when I get it, but doesn't look like it will be too annoying from the picture, and reviews people say it's fine