Switching my bike to SS was the best change I ever made. The bikes that are just for fun still have gears, but a commuter or transportation bike does very well with SS. I started with 59GI two years ago and used 67GI this year. I wouldn't put gears on it even if they were free.

The riding will be different, but you will get used to it. Don't be afraid to run a low gear and learn to spin.