I've stashing my food pack in the woods for more than ten years and I've never had a problem with bears or mice.  I learned this from Cliff Jacobs and he's been stashing for a long time.  You save the weight of the rope and pulleys plus the time it takes to hang the pack.  Plus, I absolutely hated hanging the food pack, what a PITA trying to throw a rope over a high tree branch, even finding a decent branch is a pain.