Would share with you my cat litter experience.
For me there's 3 things to consider: odor control, ease of cleaning up and tracking.

First it was clumping sand - after throwing the waste into the tong sampah still smells.. maybe it wasn't a very good brand. There's also the problem of tracking. Anyway i change to Feline Pine - this one is better in odor control and can just flush the solids as water would breakdown the pellets. However, there's a lot of tracking - my cat digs/scratches really hard when she needs to go and since I let her run loose in my house, she will bring the dust all over the house and onto my sofa... it was quite hard to clean (for me anyway).

Then I tried crystals - first tried the round ones coz read caution from forummers that it's easier on the cat's paws. Odor control with crystals are great, and solid easily cleaned. However, the round ones would roll really well and curious cat (such as mine) tend to play with them.. and would purposely sent some flying just so she can chase around... I find it very hard to sweep with the round beads rolling around.. So changed to the 'rocky' ones... it's working ok so far - easier to sweep. Else is the same. I recommended the more expensive (RM19.90 per pack) one with one cat on the package - the crystals only white and blue while for Little Star (two persians on package) it's around RM13.00/pack - crystals are white, blue and pink. The absorption rate of urine is not as fast as the single cat - my cat's fur smell of a bit of urine when using little star.

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