I've been having a great time on the rollers so far, and only one crash. The fan makes things much harder, even 1/4 open the effort is such that doing 24 mph is tough on an interval and recovery speed is around 12 mph. That low speed makes it tough to balance. Without the fan connected, baseline speed is 18-20 mph and intervals are at 38+ mph. Much easier to balance at those speeds.

The fan makes it so where you seriously have to pedal circles. Much more so than without. Still think it's funny that at all speeds it's way tougher than riding on the road. Seems like riding greased tires on wet ice while drunk...

Interval training is seemingly where this thing shines. No interruption at all. If it wasn't for this set up I wouldn't be getting many miles right now. Too cold! I do wish I would have bought them last year.