This is a very nice litter box.  I will say that with 2 cats there is definitely some maintenance needed to keep the litter box working.  I typically change the litter tray every 4 days.  When I do, I always clean the litter box, wipe it down, shake out litter, and wipe the bottom.  My cats tend to go on the side of the box which causes issues and odors.  I had to order another litter box recently, as the first one lasted only 1 year.  The sweeper, over time, gets stuck when the cats dig a pile in the middle or corner of the litter tray.  Overall I like the ease and use of this tray, but it could use some improvements.