I use my long narrow fridge smart containers all the time, they are the perfect size for holding all my d/w liquid, sponges, torch etc under my kitchen sink. And the round lettuce one is used pretty regularly to clean out the fish tank I could never get in to using them for their intended use anyways.

For over 2 years, 5 days a week though, DH and I take a salad to work for lunch in our square containers - clear bottoms with green lids and they are stackable and liquid tight. Have definitely got my money's worth. And the half a square one is great for keeping half an avocado green.