I heard about this one for a long time and I always want to get one.

But

i) I am not ready to spend such money to buy a toilet for icebox (my cat) currently.

ii) Icebox travels a lot. I have to observed her ........every time when she come back home to make sure she is ok with the trip.

Icebox is very upset when she had to share a bathroom with my sister's cat. It is very easy to tell she was in bad mood when she left her bathroom. But when she go back home use her own bathroom, she is very relax.