You'll probably want lower gearing than you have with your upright, simply because you can't stand. And at some point, you're going too slow to balance. The Cruzbikes have short chains, but along with that feature comes pedal steer. Some people learn to deal with it and some people simply can't ride the things at all. So what you'll see is people who love them -- or hate them. There doesn't seem to be an in-between.