Best value, great product
I've been using Cat's best Oko plus litter for almost a year now. I buy the 40L bags and they last about 3 months with my two cats.
Pros:
-economical, especially in comparison to the most similar product available at the supermarket
-excellent clumping
-easy to clean - it's flushable, or at least it is in my house. I don't have a garden so composting isn't an option.
-light weight compared to the clay kind, which is great when I am doing a full clean of my 2 litter boxes as I wouldn't flush that much at once
-long lasting - I only have to fully clean/wash out the litter boxes once a month, it clumps that well
-pretty good at disguising the poop smell. The urine smell is non-existant. I scoop the boxes 1-2x a day, and I have one large covered box and one small open one for 2 cats.
Cons
-does track, especially if the kitties get any of the wet litter on their feet whilst using the box. However, doesn't track any worse than the clay, and it is easily vaccuumed up. I use the litter-catching mats to help with this.
-my cats adapted to it pretty quickly
-bits do stick easily to bathroom rugs. I have taken to lifting these off the floor between showers.
The variety of a similar, vegetable based litter I bougth at the supermarket did have a slightly better scent which concealed every trace of poop smell, but the price compared to the Oko plus just isn't worth it. If the kitties go number 2 whilst I'm home, I know it pretty quickly and I just go and scoop right away. If I'm out at work and it's had a few hours to settle, I only know there is poop there when I scoop.
If you're switching litters, it always pays to mix the old with the new whilst kitties adapt.