I helped a guy today on the trail who had flatted out. He had one of those little pumps.....he was in awe of the ease and speed that we were done getting him back up and rolling.
Not to mention the awe you guys displayed at the condensation forming on the outside of the co2 cylinder.
I would just throw out here, that you may also want to keep one of the hand pumps in your camelbak (or buy a combo unit) just in case. If you're riding a walkable distance to the car, not a big deal, but if you're ever out at Croom or some other desolate location, where you could be walking for hours and dehydrate along the way, and then of course keel over and drop dead, then I'd keep a hand pump (they make really light ones) with you as well.