This is very poor quality. The material is very cheap and many pieces are chipped. 
The instructions are vague and wrong for the most part. There are some instructions that have only partially been translated. 
The screws on the sides are concealed with white stickers. And there is white chalk provided to go over imperfections or chipped areas in the particle board. If the company knows they need to provide chalk with this product, to me that's a sign they know how poor this product is made.
If this was a $50 bookcase that would be fine. But it is way over priced for what you get.
Would not recommend purchasing.