The boxes are fine once folded correctly. The lids from tearing them off the box to fitting them onto the box once all are assembled… Well. the lids are not good. These boxes can hold a lot but if it’s heavy they feel like they’ll fail although I haven’t had them fail - they just feel wobbly I like the ones that fold up easier and double-walled… although I don’t know where I got those.
I am more than pleased with my boxes. Excellent quality and I have used them in my garage! The white stacked boxes makes everything look nice and neat.