Tubs/racks are much easier to clean and take up less room due to stackability. The tubs are also cheap enough that you can have spares. I have 3-4 ready to insert into my racks when there is a dirty tub to clean. That also means I can clean more at one time instead of running back and forth to clean one cage/aquarium. If it's a mess and the snake is laying in it I will clean them too. My female mojave is a dirty little creature..