I bought another one of these bookcases, as I wanted to have two next to each other.  in terms of putting together, the first bit where you screw in the iron rods are easy enough, but the tough part is getting the wooden shelves in. They do not have any pre-drilled holes in them, so you need to do it yourself. After the first one, I realised i had to buy an electric screw driver! It was easy enough with that. 
Overall, they look really nice, exactly like in the picture. 
But they aren't as stable as I would like. Also the two that I have do not line up a 100%. So there are obviously some differences in each piece. 
I like the way they look, they definitely add something to the room!