This was my second purchase from Shelving.com. My first was the same shelving but in a 24" x 24". My products where shipped promptly but the packing could be somewhat better. I was lucky and nothing was damaged. These shelves work great and I have them loaded with a good amount of weight. I work as a maintenance tech. I have seen these shelves used in different sizes and grade. They will work well so long as you keep them square and level. Otherwise the plastic collars can crack. It is sad the company that makes them does not stress this more in the installation instruction. BTW! These selves set up easy and the legs do allow for leveling. I would give them a 5 if the packing was slightly better.