The Jr's great. Woke up the truck like you wouldn't believe, It also helped on mileage. I have mine on the 100 settings and if I get on it I can smoke up an intersection pretty good, but clears up fast. I know there is a beta download that is supposed to eliminate the smoke or at least greatly reduce it. Now I just got an MP-8 I am going to stack it with. Doesn't look that tough to install. But pickig a good place to mount the dial.