John Forester (yes, the John Forester) tests a coaster brake (BikeWorld, 1974)
The irony of Forester trying to argue in favor of better brakes for "
beginners and those using bicycles bought for them by unknowing parents."
Grumbling about Forester aside, the first (and last) time I've ever had an opportunity to ride a 2-speed Bendix kickback was on an
1957 Schwinn Corvette; one of the bikes I tuned up for Starz'
Magic City back in 2011. I took it out for a spin in the middle of the boatyard that was being used as a studio. It worked surprisingly well, even with the coasterbrake. I couldn't see it's appeal over a Sturmey hub other than to save the bike a cable run though, but I can see that being a benefit for adding an extra gear to an older ballooner.
EDIT: I forgot that I captured a screenshot of that '57 'Vette from the show:
-Kurt