Originally Posted by Bald Paul

Zwift is nothing like the old indoor trainers. I used to ride rollers and after a few minutes was either bored, or bored to the point where I lost concentration and slammed into the wall next to me - more times than I care to admit.
Zwift is more interactive, with hundreds of other riders from around the world riding along with you. Even when I'm not riding in some type of online event (the races on Zwift are brutal!) I often times find myself just trying to catch whoever is in front of me, and he/she is doing what they can to prevent it. A "casual" ride turns into a one v. one competition. I use the Zwift smart hub on a rocker plate, so the butt sore effect caused by non-movement of the bike is negated and I still get the effect of hills.