I love that the ScoopFree is lightweight.  The ease of preparing it for use is the best.  My cats went right to it to use it.  I didnt have to do anything to get them adjusted to the change.The crystals controlled the smell.  I have a multi-cat household of 8 cats. I hope that in the future you design a unit specifically for 6+ multi-cat households. I am already a PetSafe customer of one of your other litter boxes I have used for the past 8 years but  I'm sold on this Litter box. I've already ordered accessories, more product and one for my mom. [This review was collected as part of a promotion.]