This litter is amazing.  Firstof all, we live in a small place with the cat room right next to the entrance.  There is NEVER an odor and we have had people ask if the cat does have a litter box and where we keep it.  Our cat is super picky about is box being clean.  With other litters he would go next to the box, we have never had this problem with world's best, it always stays clean enough for his tastes. :)

As a plus, it is very natural, flushable and biodegradable.  The only ingredient is corn so you don't have to worry about anything.  Also, we winced at the price the first time we bought...