Avoid Cosco.  This box would be ok, but it is not especially rugged (but not flimsy), not strong enough to sit on (for an adult, too high for a child).  I would probably have given four stars but a bracket on the lid, where the control arm attaches was not properly threaded so I could not attach the arm.  The lid also had some cosmetic damange, and I suspect in the intense sun or heat the corners will curl up.  
I called the number provided by Cosco in the instructions and they told me to call the retailer, Cosco does not have replacement parts.  I just notified Wayfair of the issue and will see how they respond.  
My advice is to avoid Cosco-brand in all things (I have a shaky step ladder with "Cosco" on it too), or don't pay more than $150 for this box.  I paid $250.