I have both a traditional litter box in the laundry room and a Breeze system in the bathroom for my cat. He likes the Breeze and he didn't hesitate to use it the first time, but he still seems to prefer the other box most of the time. When he does use the Breeze it's nearly always just for peeing, but if that was the only box available I'm sure he'd use it for everything. My only complaint is that we do still get a bit of a mess. The litter doesn't track out of the box, but there's nothing to keep them from kicking it out on purpose! I find it several feet away and sometimes out in the hallway. I like the box though, and have had no problem whatsoever with odor. Even if I stretch the time between pad changes I still can't smell anything when I take out the tray.