This thing is awesome! Really helps with litter tracking, but it does collect in the little section they enter from. A cut to size litter mat would probably be needed there as well as one in front to really keep it all inside. Also, the interior circle bit is not blue, it's white. Overall, it is a more attractive way to store a litter box and does help keep smell down. Instructions were terrible and you need to remove the black plastic from the screw on the legs. This was not in the directions and it wasn't remotely obvious or easy.