I used the boxes to organize shoes storage space inside of an old antique Asian cabinet . The module system allowed me to  customize the configuration that I needed. It is surprisingly quite stable and solid once assembled . It took me some time to figure out how to assemble ( the instructions are not detailed and some important parts on the picture are so small that I can’t see/ read  but just intuitively  one can figure out the right way). Overall I am quite happy and will order extra sets to organize storage inside of my closets