We have many things to store that are not particularly heavy or that don't need to be stacked too high. These are good light duty boxes. We have stored heavier items in these but they can collapse if not full and other heavy boxes are placed on top. We do use a lot of these for a vvariety of items but we are cautious about what we put in them and how high we can stack them.
I found the corrugated cardboard boxes to be a bit lacking. The lid corners seem to have a tendency to tear. I ended up reinforcing mine with duct tape which also helps to keep the lid corners inside their slots. Instructions/diagrams to put the boxes together were easy to understand. A suggestion to Staples/manufacturer - these may be "economy" storage boxes but please indicate weight that the boxes can hold.
I always use these for moving my books -- they're awesome in that they don't need tape are decently durable have handles aren't too heavy to move when they're full stack well enough and fold back up afterward to take up less space.