The IRIS Top Entry Cat Litter Box is a very well designed and very effective litter box. My cats took to it without any hesitation. I suspect they like privacy as much as anyone. There has been no problem with litter being tracked out of the box. I would suggest checking the lid before opening to avoid scattering any litter in the grooves. My strongest selling point is keeping my dogs out of my cats' business. I have tall dogs, and was almost certain they would still be able to get into things I don't want them getting into. But, no, every attempt was foiled by clever design. One negative is litter sticking to the bottom of the pan. But that is typical of any pan really. The higher sides just makes it a bit more difficult to maneuver the litter out. Laying the pan in its side with a few swift slaps to the bottom loosened everything up.