These were great! Easy to put together, durable, and very chic looking.  They are made out of recycled paper which gives them an odd texture, but it does not compromise their look and durability.  We have several books in each of them, stacked on one another, and they are holding strong.
However, the website advertises them as shelves.  They are not shelves.  They do not come with any hanging equipment, so they cannot be used as seen on the website. 
Otherwise, they are great!