Book vs flip covers

Hey there,

So I'm looking for a case for my new glo. I've had my old sony ereader for years and have always had a book style cover for it (one that you open sideways)

Tuff-luv are currently doing some pretty cool embossed leather cases as you might have seen, such as this one here.

What are flip covers like, are they as nice to hold?

Thanks,
Bytes