I saw something similar to this product at Sam’s but it didn’t have a lid. I started looking for some that I could stack and use as toy boxes for my daughter’s room and needed up on Amazon (of course ?). All of the reviews for this seemed good and the price wasn’t astronomical. I received them a few days ago and immediately put them together. This is what I found:1- They’re made out of the same material as a cheap plastic tote.2- It is not truly “pop-up”. You unfold the pieces that are snapped in place prior to shipping. Some of them weren’t snapped in.3- Nothing actually locks in place. If you attempt to move it by grabbing anything other than the side handles and holding it upright, the lid will fall off. It was surprising since the lid was kind of difficult to get on. They also don’t lock to each other when stacked. They simply have dents in the lid that the “feet” sit in.4- They’re not stable when stacked. If children tipping them over is not an issue at your house, then you’re good. Mine however, is. My 1.5yo tipped the top ones over on her when I had them stacked 5 high. I stacked them three high and she thought it was a game knocking them over one by one. To remedy this I screwed them to the wall.All in all, they look nice and function. If it wasn’t such a pain to return, and have all of her toys all over the place while searching for new ones, I would definitely return them. For now I’m keeping them while searching for some that are better quality.Absolutely love these! They pop together easily and stack wonderfully. The capacity allows you to store quite a bit (I’m using them for clothes) and the see through doors make it easier to find / access things.I used these bins to travel to another city. They held up well to the truck bed and still looked great even after lugging cooking supplies, books, pet food, and electronics to another apartment. These bins are a great storage option that has everything I was looking for; transparent windows, side doors, stackability, and foldability. I bought the 5 set and might buy another to move cross country.Very happy with these little storage bins! I needed my clothes/odd ends more accessible since my RV bedroom storage is limited. These are a perfect solution, with easy set up/takedown, sturdy/stackable, and I like that I can collapse them down if not needed in my RV. Will definitely be buying more!