The top surface has a reinforcement layer underneath, but the shelf does not, and is quite flimsy. Although the shipping box was undamaged, it was probably dropped flat on one end, causing the casters inside to break loose and damage both the shelf top surface and the work surface to be caved in along one edge: unsightly and resulting in a sharp pointed corner. On the plus side, it has nice heavy casters, and was easy to assemble. It was returned for credit.