I loved the stuff when I had ducklings. Shavings didn't last more than one day and that was pushing it. A thick layer of the pellets expanded and stirred often, lasted two to three days. This was in a 4 x 4 coop with only three ducklings in the coop mostly just at night. I would use it again if I have ducklings.
I tried it in my big coops with the chickens and they didn't like it. They wouldn't scratch in it, so it didn't get mixed enough. Picky girls. It worked well if mixed often, but the shavings work better for mine.