I purchased three of these to organize my garage. I was amazed that every piece was so well marked and aligned where it was meant to go so perfectly. The same with all three.  The hardware was on a cardboard also well labeled. The instructions were easy to follow. 
   The only thing I didn’t like was the three slots on each back panel.  I figured they would allow spiders and dirt to pass through, so I put aluminum tape over them. I didn’t use duct tape as over time it gets sticky and falls off. I also put tape on each end joint to close gaps.