There is a problem with a fixed gear bike for commuting or any road riding. The bike is a direct drive. Your speed will force your feet around. In order to keep your feet from rotating, you have to be at a complete stop. If you are one of those people who does about 12 pedal revolutions and then coasts for a second or two, a fixed gear bike is not a good idea. Now I am not saying that a fixed gear bike is not a decent thing to use for certain riders. But the fixed gear is not for everyone. The advantage of a fixed gear bike is that you dispense with the rear cluster, the shifters, and the two deraillers resulting in a cost and weight savings. Also, a fixed gear bike being much more mechanically simple is more reliable than a multigear bike.