This is a smart addition to organize our bathroom that took about 90 minutes for two people to assemble. The cabinet seemed wobbly as we went through the assembly steps but once we had the back attached and the shelves installed it stiffens up just fine. Here's two additional instructions that you may find helpful. In Step 8, the smooth edge of Part 5 bottom board is the front. The two level edge goes in the back of the cabinet and is a lip to set the two back board Part 8.  In Step 12, Insert  Part P between the two back boards, Part 8(2 pieces) before securing the back board to the cabinet.