We use these boxes all the time in my office. They are sold as "economy" boxes but we use them to box files for long term storage and I don't know why you would want to spend more money on a higher quality box- certainly if you are going to use them to store papers and folders as we do. Maybe if you were storing valuables like China you would buy the more expensive boxes but these seem to work fine in spite of our practice to load them with as many pieces of paper as we can fit in the box. We also stack these three high with no problem
We got these boxes to store the contents of a four drawer file cabinet plus lots of miscellaneous stuff that was stored in various boxes mdrawers etc. these boxes not only contained all my stuff neatly but now everything is in uniform containers. There is also space on the end to label the contents. And with their uniform size and sturdy tops we can stack them easily. They also have handy gripping slots in each end for carrying. The only thing to note is to be very careful to follow the assembly instructions exactly so they go together correctly.
I order/buy these boxes every year for when I'm putting my year end things away. I love these boxes. They are easy to assemble and are very sturdy. I will continue to buy these every year from Staples. Thank you for having great products.