Very accurately cut pieces and precisely pre-drilled holes. If I was to put another one together it would probably be closer to the estimate of 2 hours. The only thing that gave me pause was the location of the tab to disassemble the drawer slides. It took way too long to find them. The pictures didn't help because they didn't bear any resemblance to the actual tab locations. It will also help greatly if you the lay out the parts numerically and alphabetically. The "I" on one bag looked like a "T" because of lack of ink on it. Also, it would have helped if the bags had white ink instead of black.