For onroad, sensorless sucks.
Sensorless works well in airplanes as they do not need the precise control that a car needs for racing. I have a hacker system and two Novak systems. For onroad the new Novak system is excellent, and the new LRP system is on par with the Novak
Sensorless systems are less complicated than sensored systems. You probably know that it took Novak about 3 years to produce the new velocity system. I don'r recommend the older Novak system.