I would say these are just "ok".  I bought these for a kids room for storage.  They are a nice size and nice looking, but they are very flimsy!  I wasn't expecting them to be heavy duty, but I was expecting for the magnets to work and be aligned.  It will work for what I needed for now, but if you're looking to stack and store where the lids magnet shut tightly then I would look for something a little more sturdy.