I've been running a coaster as a messanger everyday for about a year now and i feel more in control of my bike than when it was fixed or when i was on a road bike. but what kind of hub you have can make all the differance. I started with a Shimano and loved it, then went to a Bendix red band, it was ok but the problems that it had were to perticular to go into detail about. i've used older perry and sturmey hubs and when it was really cold it would act like a broken freewheel and you would pedal forwards and the cog would move but it would drive the hub. Thankfully i never really hurt myself but i've defenatly fallen on to the bike and put both feet down to stop going somewhat fast. but the shimano didn't give me any problems untill about 6 months of riding (overhauling about twice a month, should have done it more often) when i replaced the entire innards. then that started to wear out too fast, so now i have an old Sachs and it has been pretty sweet. Also i have welded on a slotted tab to bolt the break arm to because i kept breaking straps. if you cant do this i would recomend doubling up on the strap if you are going to be riding this all the time. But don't forget to skid all the time, it's my favorite thing to do especialy when it's raining.