Unfortunately, the first bookcase I received was terrible! The slats at the back didn't fit into the slots at all, the holes were drilled in completely the wrong places, and I spent a solid two hours trying to put it together before realising there was no way to do so. The holes were all out of alignment. What a waste of time. 

I got a new one sent out by Wayfair and this one looks fantastic! Although it feels fairly cheaply made and can be a bit wobbly, it actually looks expensive when you're just looking at it and not putting it together, haha. So overall I'm happy with my purchase... now. I've even had several compliments on it!