I've only used one box but it was hard to put together. I used scissors and my hands to separate the dotted lines but I needed a box cutter. The instructions weren't clear. I needed packing tape to reinforce a cut I shouldn't have made.
These are excellent boxes for file storage. I bought these to pack up stuff while my house was painted. They are not designed for heavy objects. They can be easily unfolded and stored flat.
Perforation at seams rips easily. But for a basic box it’s just OK. Not suitable for long term storage. Kind of cheaply made. This is probably the worst review I have ever done of a Staples product. I’m usually 100% satisfied.