It’s a nice piece for the price. Assembly was difficult because the 12” screws that are used to attach the small metal brackets are nearly impossible to tighten unless you have really good leverage. Even then it takes a lot of elbow grease to get them in. I don’t thing these small screws are machined for metal, or the holes in the metal are too small. They screw into the wood fine but the metal is ridiculously hard. 
FYI...I figured out that if you attach the metal brackets into the metal first, then into the wood, it works much better. Opposite of what the instructions tell you to do. Otherwise there isn’t enough clearance to get the leverage you need to screw them into the metal. Again, nice piece but assembly is difficult. About 5 hours for me.