Depending on the driver's style of riding, it does take a little practice and coordination between the rider and the driver to ride completely smoothly, though this didn't take more than 5 minutes or so, dramatically easier than learning to ride a bike, which we've all done already, right?
All in all, Companion Bike Seat's first road-trip proved successful, exceeding all expectations. Really excited about having a whole more within the next couple months!