I know what they are but I've never tried one. In videos they don't seem to be super quick and easy to deploy. Presumably they must work in at least some cases or they would've fallen out of favor by now. I'll probably never try them and I've never seen them in any local store.

My stomping grounds has some of the highest concentration of grizzly bears per square mile in the CONUS. Bear spray is the standard go-to for most hikers while most hunters here carry spray and a gun. I too go for bear spray and a sidearm in a chest holster.