After having some issues with the original rim tape causing flats after being respoked, I got pretty good at fixing flats. I could probably change most flats in 5 minutes including pump up with the hand pump. The only thing that slows me down is tires that are very tight on the rim (I'm looking at you Vittoria Randonneurs). Seriously, these things wear out my nylon levers like you wouldn't believe. I do like them, but I hate that they are such a pain to get on and off.