To me the CO2 Power Tank has so many advantages.
Quick fill up, portability (does not need to be solid mounted) and good distance out of a tank.
Downfalls. You can run out of CO2.
Cost of purchase. ...All the good
set-ups will cost us a chunk of change.
You have a $75K + van, how can you cheap out on air???
As with propane canisters, with CO2 you/I will have to determine refill requirements.
Some of the times posted for airing up tires is just crazy slow.
I am not that patient!
I haven't yet, but I plan to go Power Tank.
I haven't heard of problems too much from owners.
Only non owner nay sayers speaking the negatives.