My commute is usually about 10 minutes by car. I was astonished when I tried it on my 24 speed MTB and found that that time increased to 30 minutes. To try to cut that time I switched to my single-speed road rig and my time reduced to 20 minutes. I can live with that, especially out of a fixie. Plus it helps to get me awake in the morning rather than ariving still half asleep.