I think I like the Case Logic's model.
If you look very close at the last photo, you can see the four corner straps.
I was originally all for the book style cover, but i've heard a lot of stories of the plastic pins breaking and obviously the quality isn't as high as say the MEdge covers.
Also most people want to fold the book style cover behind itself when they read. I just want a cover to throw in my bad and protect the screen and this seems like the one they should have put in the first place and not that sorry excuse of a neoprene 'dust cover', because that's all it can do, protect from dust.