I've put together several of this type of shelf, and I don't expect them to be fine furniture at this price.  But this one should have been a simple project, and the poor quality of materials made it difficult.  The locking bolt pieces are cheap plastic and don't fit well, and the fiberboard chips badly with any amount of pressure to try to lock them into place.  Completely assembled, it is still very wobbly.  Also, there are not enough shelves to make it look like it does in the picture.  I would not recommend and I would not buy again.   

Pros: Fairly inexpensive.
Cons: Poor quality parts, and not as pictured.