On a serious note, I don't know how useful this thing would for be for its intended use: providing a flat service to the driver while the car is parked. There isn't much room between your chest and the steering wheel (this issue is particularly troublesome for well-endowed women). So it seems easier just to switch over to the passenger's side and use a lap table. You'll have more room.

If you frequently need to use a laptop while driving, maybe the police car solution of mounting a stand between the two seats is better.