Um. Is it so hard to change gears? Almost every bike has the shifters right on the bars where you can get at them without moving your hands off the grips. Not to mention....$400 for that thing? You could get a really nice "suitable for off-road use" mountain bike that likely weighs a lot less than the landrider as well. I just don't see the need for the added weight and complexity of the auto-shifty thingy. It's interesting in principle, but I don't see it ever showing up on higher-end bikes.
Fausto