Great and long lasting if you don't abuse them. The two biggest reasons they don't last are you misstacked the light ones on the bottom or the lid wasn't on and it got bent. Used for both paper and memorabilia storage by me. One problem is getting the lid disconnected easily from the base without damage. The perferation of the base of the box is fine. You probably could collapse them when not in use but I have never tried it. I expect the 65% recyled number to rise as recycling efforts in general have picked up and will over the next few years from the small business side.
I enjoy shopping at Staples. The people are helpful I like the cartridge return program and sales are good values. The e-mails I receive are often timely for my purposes and specials are helpful.
We used these for files but also to store items for moving a office. They assemble easy and quick and were durable. I actually did not see the need for the medium or heavy duty versions. We tried medium and heavy duty but these boxes were just as durable.
The economy storage box are wonderful. I have a gift shop so I use them for overstock book sales end of year reports and etc. They are easy to assemble and they do not come apart. The handles are a plus when needing to lift and carry.