Excellent litter box for big cats.  My boy is a “high whizzer”, so a tall litter box is a must.  Keeps the whiz in the box.  Nice and roomy, which he also likes, along with the open top.  Easy to scoop, although the little scoop that it comes with is TINY and flimsy, but the box is worth every dollar, just get a better scooper.  Overall, very good quality.