The bins fit nicely under the cage. They are correct in that the bins don't need the covers....easy accessibility without the covers is exactly what I like. I added furniture mover felt discs on the bottoms to allow the bins to slide more easily on my hardwood floors. I also customized the handles with a visit to Home Depot because only white ones were available when I ordered.

I would like to see the upper and bottom corners have a rivet also. But other then that they are great. They look great under the cage and have a good amount of storage space.