Cheap and cheerful, but at that price, you cannot expect quality.   I bought 2 bookcases, and they hold books, not much else to say.    

My one ‘complaint’ is that you should be careful when fitting the back panels on.    It is very easy to ‘blow’ out the side of the bookcase with the panel pins, if you place them too near the back edges.  

Simple solution, take a bit of time to place the pin before hammering it in.