Used to use it and I loved it. The only reason I stopped was because you could only get it from one place in my area and they kept running out so I had to keep switching back to shavings.
We used it at the last yard that we were at - and bought it by the pallet. I used to be able to buy a pallet of 60 bags for £220, which equates to £3.66 ea. We stopped using it when we moved to a yard which was all inclusive.
I saw them at YHL in Novemeber and seem to remember that the price of the bedding has shot up, but I think that if you negotiate hard, you should be able to get a reasonable discount.
Might be worth trying them direct. After all, a pallet straight from the suppliers requires less handling...