I actually bought one of these and love it. My road bike is indistinguishable from any other normal road bike with the exception of it being much easier to get around now.

From experience I can say that it seems like a lot more common sense to simply replace the front wheel of your bike with a wheel containing an electric motor, rather than attaching whatever Asus is selling to your bike.

Note that this is the most common and cheap approach: a hub motor, battery, controller, Hall-effect cadence sensor. There are renowned Chinese companies that sell those and you can find great deals if you shop around.