This mat is awesome!! I had a real problem with my three cats tracking litter all over my house & my things.  Now, it stays in front of the litter box, trapped in the unique design of the mat itself.  To clean it all you do is take it outside & shake it off & hose it down!! Simple & convenient.  The large size is perfect for accomodating two litter boxes placed side by side (like I do).  This is a real asset & well worth the money.