This is great.  It has solved 2 problems for me. One of my kitties habitually stands in the box, but has her butt hanging out the door of my old enclosed litter box (the kind that looks like an end table), making a mess on the floor. Now she has to walk through the first chamber to get to the box, eliminating the problem.

Second, My dogs cannot reach through to the second chamber to get to the litter box now, and since this one opens from the top, they cannot rip the door off it's hinges to get inside.

my only complaint/suggestion would be to request some type of fitted waterproof liner for the bottom of each chamber to make it easier to remove any tracked litter (and in my case, pee from the first chamber).

This is the best enclosed litter box I have found to date!

Thank you!  It is worth every penny!