The instructions said it would take about an hour to assemble the unit; it actually took closer to three hours. There were no written instructions, just diagrams. So I had to carefully study the illustrations.  The pre-drilled holes for the locking nuts were a bit too large, allowing some of the nuts to fall out during assembly. Frustrating, to say the least. Also, in one the supporting braces, the holes were too close to the edge. So, in tightening, the lock nut splintered through the back of the brace. The locking hinge for the door seems flimsy and wobbly. It's just an OK cabinet.