I will second the comments on the shifting...once you get used to it it becomes second nature. Years ago I had a paper route and had my LBS build up a new rear wheel with a 2 speed on it, great deal and made the route go easier. I had a back up bike with a regular coaster brake on it, it always took about half the route to keep from trying to get the gear to kick in I still have the 2 speed hub and wheel...just haven't found anything to mount it too...yet Might try and find a cantilever frame and build up a bomber or something.

Aaron