I got this box from rack attack about 2 years ago and love it. Easy to install on my mini van by myself. I approach my van from the rear, lift the box until the front bottom of it rests on the rear rack crossbar, then just slide it onto the roof rack. The box if empty is light enough for me to carry alone and manipulate into place. The main thing I like about this cargo box is that it fits, attached, on top of my mini into my garage with room to spare. The box has never leaked, I sometimes need to pack wet items in it and it helps avoid getting the inside of my van wet when I need to travel. On a mini van it is a little high up, but if I stand on the sliding door step I can reach everything inside. Unlike other boxes this one snaps closed so I know that the lock will then work to lock it. Best cargo box ever if you desire a very low profile.
2015 Toyota Sienna dual door