I purchased this because I needed to store something’s ,It was very good value for money as most of these were 125+.it holds a lot I got 25 medium boxes in it (3ft /5ft).had a little trouble putting together but was easily sorted .I raised boxes of the floor as you don’t get flooring with it .the cover is thick but not too heavy .we had rain since using and everything seems dry so I would say it’s waterproof . good quality although we did anchor down .I will continue to use after boxes removed , would definitely recommend ..