QwkAg...
Yes, I like Halon, and we have a couple in each house, though I have never used them, so no first hand experience. Ours are smallish, like a double jumbo can of Fabreze maybe, but I have them.
As for carrying one in the car, I just never thought much about it or cared...
If I saw a car on fire with people in it, I would judge carefully, and of course try to extricate them if I could, but I am not a fireman and don't feel the need to try and be one. If the fire is that bad, a FE may not work...it depends on the situ and the hand of fate, imo.
And, that situ has never presented itself to me in my 67 yrs on the planet.
Sort of like a special UFO camera, for when one appears.
GL, YBFAM