Well currently I have World's Best cat litter in my litter boxes and I really just can't understand why this litter is so popular. I've only been using it for maybe a week and this stuff smells SO bad! It smells sickly sweet for the first 2 days and after that it just smells rancid! I like the fact that it's flushable. And it clumps extremely well. Are there any other clumping, flushable litters out there?