The box itself seems sturdy but the lid fits poorly and the "handles" are rough and you need to use caution to avoid being cut when carrying a filled box. I sorted through all available to find one that was the "best quality" and only bought it because of price / my need to have a file box.
I love the size of this box and I love that it is clear. Makes it easy to see that I have files stored in it. It is pretty durable and I got mine on sale.