Im an ABS fan, it cost a few dollara more to fill the canister but there is never an issue with temp. when deploying. Never have had to pull the trigger,
They are very important to have if you ride in the backcountry, or even off Trail. I bought one for my 13 yr. old son this yr. He is following me way to much, and I want him safe. Pluse it shows him that you must have the right gear when ridding in the back country.