I own a restaurant and have used these racks for several years to accommodate inventory of my groceries in the business. I use them inside the walking cooler and in the freezer. I recommend this product as the quality is excellent and the cost is also excellent. I tried other rack brands to deliver to Puerto Rico and they were the only ones that shipped me and arrived in record time.I've bought an additional 2 of these after the first one was so sturdy and easy to assemble. You do need a mallet to truly get the shelves nice and tight on the bracers. Additionally, you have to be careful not to hit the inside bars of the shelves while you're banging the shelves into place as they are easily bent with the force you are applying.With that said, there are feet on the bottom of each pole that you can tighten or loosen in order to balance the entire rack which is always needed from human error.I love these. They are tall and at first I didn't realize how much I liked the ability to set where each shelf went until I realized one box was too tall to fit. You can buy more and stack them next to each other without any issue. They go right up against walls.It would be great if they came out with a black metal version so that they would look fine in my house. Shelves for days!I created a kitchenette area using the items in the photo attached, including the really 'eeEZe' 10 minute install of this rack. Quality finish, shelving is a good weight and doesn't bend even with a heavy load on several shelves, including a portable convection oven. On my wood floor the fully loaded rack slid easily without rocking or marking when I needed to move it out for cleaning and access to a wall outlet near the bottom (now equipped with a heavy duty power strip to limit moving!). I placed the shelves at the locations needed for my appliances, dishes, groceries, etc which was invaluable and it was super simple because the legs are marked with 1" indentations where the clips snap, so no uneven shelves. This shelving actually holds more than all of my previous cabinetry did. High marks for this product.Love these shelves. Easy to put together, perfect measurements and they really help our storage room to get organized!Has screw feet so we could adjust the shelves to be balanced on our old uneven floors.They are shiny and look great too!I got creative and decided I did not want my dresser. My dresser could not hold some things I needed. So I threw out the dresser, got matching transparent bins of sizes I needed, and bought these metal shelves. They are resizable, dressers are not. They are deeper, wider, I can fit more bins than drawers, It's taller. It's transparent so I can see without opening (though I could get opaque ones if I wanted). My advice is to throw out your dressers and get one of these.I love this shelf and plan on getting another one. It works well in our makeshift pantry and stores a lot of heavy canned goods with no problem what so ever.I like these shelves. They are just what I needed, at a great price point. I would not call them "heavy duty" though. More like "medium duty". I doubt each shelf could hold 350lbs. Perhaps 100-150lbs with some sagging? I have a 7 gallon container of water (about 58lbs) on a shelf, and the shelf flexes a bit. These are not nearly as strong as the Metro line from The Container Store, but at 1/3 the cost, a much better deal if you don't need the strength the Metro line provides. The welds seem to be of good quality but not all of the wires are straight; some are curved, wavy or a little bent. This does not seem to affect performance however.. I would definitely buy these again...planning to pick another one up in the near future as a matter of fact.I really like these shelves and I've really loaded them down. It looks like they can handle the load, time will tell.I would have given them five stars but the threaded connectors for the corner posts don't thread very well into the posts. They have a real tendency to cross thread. I ended up using thread cutting fluid to lubricate them. I think most any lubricant would help.