Tracks more than wood pellets, but less waste
I previously used non-clumping wood pellet litter, but as there was a lot of dust and I went through the litter rather quickly, I gave World's Best a go. I'm pretty pleased with World's Best - it clumps great which means the litter lasts for longer, and with the added bonus that the waste can be flushed down the toilet. It's been almost 2 months since I bought the sack, and I've still got over half left (with just one cat).
The only downside is that it does track more than the wood pellets.