Just purchased an Ursack to use instead of my BV450:
I hike in area in the sierras that DO NOT require a bear canister; I have been lugging my 2lb bear vault around for years now as I have had my food snagged before.
I just purchased an Ursack "all white" model and will be going up the mountain this week; I can't say that I am not a little nervous about the change however the saving of 20oz is pretty spectacular!
Love to hear thoughts, experiences, tips, etc