These units are great. They are VERY sturdy. You can buy additional shelves for this brand and while they are a bit pricey, that's the only way to get 6 shelves so you end up with 12.5 inches between each shelf plus a shelf on the very top which is perfect for things like paper towels and big packs of toilet paper and many types of the sterlite storage boxes. Just seems like the perfect height. The additional shelf includes clips. These are great for in closets so you can pull the unit out and get to stuff behind it or move it around in a room. I got two other brands of shelf that were cheaper but not as sturdy. I'll pay the extra $$ and stick with Seville. TIP: To keep the clips from flying off when you're putting it together, use a small piece of black electrical tape along the BOTTOM of each clip to hold it in place until you get the shelf over all 4 clips. Then remove the tape and push or use a rubber hammer to seat the shelf securely.