Been wanting to try CO2 but my lezny mini pump with storable hose works pretty good. Better than an old Topeak one I had back in 2009.

It's too long to fit in my rear jersey pocket however and with my downtube shape and width not allowing it installed there with the included mount it has to sit at the bottle.cage mount on the seat tube.

I'm close to buying an inflator and CO2 just to get another item off the frame. However I have terrible luck typically and could see needing more than 2 CO2 cartridges.

There's something reassuring about mechanical group sets and frame pumps when no one is home to come retrieve you.

just a beginners perspective.