I had never really given much thought to what cat litter I used. After all, it was just something you'd scoop out and throw away, so who wanted to spend much money on it? I usually purchased the cheapest clumping litter I could find. However, when we put our house on the market for sale, I experimented with switching over to Fresh Step. With 2 indoor cats, I didn't want any spur-of-the-moment potential buyers to be put off by offending odors the moment they walked in the door.
Sure enough, since switching brands to Fresh Step, I have never noticed any cat box smell when I come home...