My cats love this box.  Easy to get in and out of.  I have 2 big boys and I feel it is perfect for them.  The only drawback is they kick litter over the lowered lip in the front.  I also love that waste does not stick to the bottom and sides of box.  

Pros: Great Value, Great for big Cats, Great for cleaning
Cons: Litter can be kicked out over the front lowered lip.