I have a flip/flop hub with fixed on one side and freewheel on the other because I wasn't sure if I'd like fixed gear. Plus I wanted to get used to riding a road bike and using clipless pedals before I added the no-coasting component (I'm a slow learner). I haven't used the freewheel since I started riding fixed, but I think if I visit a city with more hills than the Twin Cities I might like the option to run the freewheel.