These boxes should not be used for serious long-term storage or for materials that need a properly fitting lid. They are also hard to use with hanging files. But they are definitely the cheapest way to move files from one office to another and they do the job even if imperfectly. They are also quick to assemble and dissasemble. And you don't feel bad throwing them out!
I use the boxes for my storage of our yearly paper work - they are easy to lable and keep in order. I also use them in my sewing room to keep my material orginazed - Less expensive then the plactic containers - and make great boxes for wrapping my quilts for gifts
I used this product to store away some items I don't use often but are nice to have on hand. I found these boxes difficult to put together as the bottom and sides were not evenly spaced to pull through to form the box. I also found that the tops don't always stay together either unfolding and fitting unevenly on top. I found that these boxes are ok but not as reliable as I thought.
I had to move and store my books and files. They were easy enough for my 13 year old to assemble and strong enough to stack 5 high. I wouldn't use them if you need to move or access the boxes often. I think they would fall apart eventually.