I personally thought Sweat Scoop was a bit on the dusty side... I think some others may have posted the same thoughts back then. If I remember correctly there were also people that swore it was totally dust free.
I've personaly switched from clumping, to crystals, to pine, and found pine the best - my 2 cats didn't have a problem with it even though i didn't switch up the litters gradually. It's completely dust free, though the smell does take some getting used to - smells like sawdust particularly when the litter is fresh.
edit to add the kind i use is actually for horses, called Equine pine stall horse bedding, though it's sold at my local petstore. $10 lasts me over a month for 2 cats!
Is Feline Pine flushable? I live on the third floor and it's a pain in the butt to run down to the dumpster 5 or 6 times a day. I've been using arm and hammer flushable which is great except for the dust. I did try Swheat Scoop and the dust was much less but I was unhappy with the odor control so I swapped back.
I'm assuming with feline pine that you change out the entire box when it's mostly saw dust, but are the solid waste clumps flushable? How often do you all change the box out?