There's nothing wrong with mini pumps, they just take a while to get up to 110 psi; otoh, they come with an eternal supply of air. CO2 is fast, but it sucks when you run out of cartridges. Try the best of both worlds- an Innovations Second Wind; it works as a pump and as a CO2 inflater. I just carry one cartridge, and if that isn't enough, I start pumping.