I don't know about anyone else, but my hand tends to cover the knob when I shift. So I'd have to put it in a gear, remove hand to check if i'm in the right gear the then re-adjust accordingly? I would think that would be very distracting to a beginner. And if you aren't a beginner, you don't need it. Looks cool, awesome gimick. IMO you could also just go ahead and label your mirrors left right and middle so you know which one you are looking at.