We have a small kitchen & the stackable bin fits perfectly in a tight corner.
A couple of the bins are for putting cans of pet food, one for cats & one for dogs. It makes it a lot easier to see when we get low & need to restock, instead of having their cans of food mixed in with ours like we did before we bought the bins. Now we don't have to scramble looking for their food either.
They're great space-savers too.

Pros: practically indespensible

Cons: none

Since we have several kinds of animals who have different kinds of food, we use these bins. We can stack them all together in one area and fill each with the bag of food. The animals have not been able to get into the bins which is really nice. They come in assorted colors so I know which bin holds which food. They are easy to fill and easy to clean.

Pros: saves space

Cons: none

I have these bins and use them for so many things.
For may cat, I have 3 stacked. Holds litter liners, cat box deodorant, toys/catnip, collars/ID tags...

It is easy to find things as the stacked bins are easily accessible with a large grove, opening, in the front of each one.

Great, bright colors.

Pros: Opening in bin

Cons: None

We use these bins at our shelter. We rely on much appreciated donations for food. These bins allow us to keep types of food separated (i.e. kitten food -vs- adult sensitive stomach etc). Space is a premium so allowing us to stack the bins is a bonus.

Pros: Allows you to separate donated shelter food

Cons: none

I have a series of stackable bins I use to store pellets and odds and ends. I bought 4 of them and have found that I rotate their usage as my needs change. They have airtight lids which makes them ideas to keep pellets fresh.

Pros: good for storing items when space is limited

Cons: limited sizes and colors