I've heard of it but never used it.
I tried the clumping litter and it was so heavy that I decided that the cats must find it a real chore to use a litter box with too much of it used in it.
So, I went back to Tidy Cats unscented, the 20 lb. bags. It is the best one to use but at $7.39 for 20 lbs. I find myself buying some other brands like "Special Kitty" litter priced at $6.79 for 25 lbs. with free delivery from Walmart (if you buy $35.00 worth of items that is!).
I use a lot of cat litter having three indoor cats. Nothing sickens me more that the smell of cat piss so I am diligent about keeping things clean and I don't try to spare cat litter when it is needed.
I wash the boxes out with a disinfectant every couple of weeks and have a spare set ready-to-use in the garage.
So, yes, this is a lot of cat supplies and the litter is ridiculous!
I don't know why your cat(s) don't go for the pine litter any longer; maybe the scent?
One thing is for certain, these pet food/supply places are making a bundle off of us!