Good luck - I sleep more soundly with a canister. An Ursack would leave me awake all night on the jump, waiting for that first tearing sound... all the stories from rangers who had to use bolt cutters to take the properly-tied ropes off the tree after the bear is done tearing open the bag from the bottom destroyed any chance I had of owning one for Sierra use.

That, and the backpacking store owner who refused to sell it to me after I told him where I was going....
"In the beginner's mind there are many possibilities. In the expert's mind there are few." Shunryu Suzuki