I just finished insulating my HT with this product. I used 9 bundles of this in my ceiling and one wall. It was easier to use than fiberglass insulation. It is not as itchy. I would highly recommend that you use a mask of some sort when you install any type of insulation.
My only issue with this product was that I could only get it in a 3" thickness. That is why I had to get 9 bundles. 12" floor joists take up a lot of insulation.