Does anybody carry it? Had a chance to use it? Did it work?

I found a website by a animal biologist and he said that black bears tend to be more aggressive and are more likely to be predatory than grizzlies, i.e., grizzlies will normally try avoid contact while black bears are more inclined to come after somebody who surprises them.

Any experiences anybody cares to share?

On a similar vein, having seen a discussion previously, has anybody had a run-in with a mountain lion that appeared to have taken an interest in them? How did you deal with it and what did the cat do?