Just to make it a little more accurate
OBA Advantages over CO2
1. have to refill ($12 each time)
2. Can freeze if over used below 32 degrees (Filling more then one set of tires)
3. leaks out of tires (5 psi in 2 weeks)
4. Takes space in the cargo compartment.
5. Needs to be safely mounted in cargo compartment.
6. Expensive, my OBA was about $35.
7. You have to open the cargo area to get the hose and turn it on (if you wire a OBA system you don't need to get a tank or access a tank).
8. CO2 is NOT normally considered "good" for the enviroment.
CO2 Advantages over OBA
1. portable
2. Fast and instant (might be better at re-seating a bead, inflating a tire is about the same time).
3. turn the tank upside down to make dry ice.
4. can be used to put out fires (doesn't replace an ABC extinguisher.)
5. fuel efficient (don't have to run your jeep)
6. Ricer kids think you have NOS.
7. can be used with a kegerator.
Michael