Currently kitty and I are using Feline Pine clumping litter. I'm not exactly sure what I expected when I picked this up, but the very lightweight box should have tipped me off. Feline Pine Original is pellets but the Scoop variety is...sawdust. OK, it's sawdust with some guar gum added but it looks, smells, and acts just like sawdust.
The smell of this is quite pleasant - if you like sawdust. And actually, it's got very good odor control abilities. It really does keep the litter box smell down. The clumping ability is fairly adequate. However, I find that clumps fall apart pretty easily when scooped, so I end up not shaking the scoop too vigorously and throw away quite a lot of good litter with the used. This means that I go through a lot of this product, and at $5 a box (or thereabouts) that can add up pretty quickly. The real problem with this litter is that kitty and I track it all over the house. All over. It's so lightweight and clings tenaciously to you that it gets everywhere. The rugs and kitty's favorite lounging spot now need de-sawdusting on a regular basis. And the floors? Sometimes I have visions of one of my shoes somehow getting involved in a criminal investigation and ending up puzzling the CSI as to the flecks of sawdust embedded in the insole: "it's as if this person was walking around barefoot in a lumber yard and then tracked the sawdust into her shoes. But then there's minute quantities of guar gum and cat urine mixed in...?"
I am putting up with the sawdust because I like the odor control, and because it doesn't kick up clouds of dust with that chemical nostril burn that regular litter has. In fact, we've been using it for months and have no current intention of switching. But it's not my holy grail.