Worst part of changing a flat, for me, is that it always seems to happen toward the end of along ride and my legs get stiff as I'm kneeling down. Some tire/rim combos are better than others. I just got some Continental Ultra Race Wires and they go on my Vuelta Corsa Pro wheels super smooth. Before that I had some Vittoria... Pros I think... and they were a bit of a pain to put on.