I have had the Magnaflow system on for about 3 weeks now. Overall it is not too loud. No drone at highway speeds. When you accelerate there is an RPM range that it sounds the loudest. I heard it from the outside the other day when the wife took the car to run an errand. It was not loud at all as she drove away. Sounded good. Overall I'm happy.
2012 Focus SE w/Sport Package
Steeda CAI, Steeda Drop Springs, Steeda RSB, Magnaflow Exhaust, 17" Drag DR34 wheels with Hankook Ventus V4 Tires