I have been using them for storing clothes and lightweight items under the beds for 1 year now. I don't sit on them, I don't step on them, I pull them out, open the lid, take out whatever I need and put it back in place. So far, nothing has broken. It doesn't seal airtight (which I didn't want anyway, I want the clothes to have some air circulation). The lid is sufficient to prevent the clothes from getting dusty or covered in pet hair, but as others have mentioned, it simply rests on top of the box. It has two small protrusions that attach to the edges, but they barely hold it in place. Indeed, there are boxes made of thicker and sturdier plastic (e.g. some models from IKEA), but the main thing is for the box to fit comfortably and make the best use of the space. Ideally, try not to fill the entire height of the empty space under the bed/sofa with the box so that you don't catch your fingers.

In a similar box with fewer liters, I stored my camera equipment, which has some weight, but so far I haven't had any issues (although it's a box I don't use frequently).

The product is more mediocre than I expected. I was expecting a cheap plastic, but I also expected the lid to somehow close, which is completely loose. If all similar products are of the same philosophy, I don't know, I have no experience and I pass.