I bought the same pump because I'm super vain and didn't want a frame mounted pump.

I did worry how it would perform when I did get a flat. Well, I finally got one on a Thanksgiving day ride and put the pump to work. You really have to jam it on the valve for it to work effectively. At first I couldn't quite get it to work (should have practiced in the garage) but once I got it fully on the valve, it took me far less than 300 pumps to get my 700X23 aired up. I'd be surprised if it was even more than 50. It didn't seem to take long at all.

So for me, I love it because it's about as big around as a CO2 cartridge, about 6 1/4 inches long and airs up the tire sufficiently