I really like the comfort level of some of the ABS packs. They just seem to fit and ride a little better than BCA. However, due to the cartridge support level in riding areas I went with the BCA. Not so much due to a real life deployment, but more on the accidental nature. We all know people who have set on off in tight trees, or whatever type circumstance. If your in the beginning of a trip and an accidental happens without carrying a spare filled cartridge it seems as if your screwed.