So realistically it’s not what I expected. Heavy duty is kind of an understatement. The middle south is pretty flimsy, and the planks that comes with our fiber board. To be quite honest I’m not disappointed but it just wasn’t what I expected. If you’re looking for a cheap shelving unit to store some not so heavy things, this is a perfect product for you. However if you plan on storing much heavier items probably over 75 pounds a shelf or more I’d be a little concerned￼. 4 stars because the price is still worth the purchase