This is a great book! It is very small and fits into a pocket very well. The pages are thick rice paper. Even with a very wet brush there was only the smallest amount of bleed through to the other side while sketching. Not enough to make any difference on sketches or writings and it was my own fault for having too much water on the brush in the first place but it's nice to know the paper can handle it.
I held this at head height (5foot 8inch) and let it open to the floor and it did not open all the way. There is plenty of paper here for a LOT of writing/sketching.
A nice thing about the accordion way it is folded, if you pay attention to the direction of your writings/drawings it can hanged from one end for display when you are done, just let the other end fall to the ground. You could also open it sideways for a very long scenic view picture.
I will definitely be getting more of these.