I got a puncture on my commute to work last week, it was a pretty slow leak but because of a strong head-wind i was running a little late, and if i'd taken the time to change the tube i was in danger of being late for work. I spend 30 seconds pumping the tire up and it got me another 1/4 mile before i had to stop and inflate again. I stopped and inflated the tire another 6 times before getting to work but i wasn't late, and for the record it was a Beto mini-pump.