I love that I can stack these as high as I need them. I use them for warehouse storage for buckaduck.com and ducksonly.com. I stack the carts 9 drawers high and currently have 10 towers of drawers. I do not use the wheels because the weight puts too much pressure on the base and makes the bottom drawer unopenable. But with the towers so high, moving them just isn't an option! I love that they have clear front. I make tags for the product that I store in each drawer that I can place inside the drawer and still see it. The cards make it easy to find the product I'm looking for and the drawers make it easy to see the cards.