Originally Posted by JohnDThompson

SS really doesn't get you much that you couldn't accomplish simply by not shifting gears on your multi-speed bike.

I find FG is a better workout; you can't slack off since you're pedaling whenever the bike is moving. It breaks you of the insidious habit of coasting and enforces a smooth pedaling technique. You learn how to spin smoothly and how to mash effectively. And it's so darned quiet!