Bought my first in 2020 to keep the patio furniture cushions in and found that there was sufficient room to keep other items as well. So far it has stayed water tight in some very wet weather.
I was sufficiently impressed to buy another to lighten the load of the shed which was bulging with stuff and looking very untidy.
Both boxes went together easily with basic tools and a drill to drill some pilot holes. 
I would say that they rate the five stars that many people are giving them.