Just installed a Boom Audio system by HD on a friends Dyna and let me tell you something...it is AWSOME. The install went real easy if you know your way around a bike, on a scale of 1 to 10 I would say it is about a 3 1/2. The sound quality is excellent and for those of you out there wishing for a sound system I would recomend this. If you are worried how it will fit with a winshield or a windshield with a bag on it, there where no issues everything fit perfect. I highly recomend this unit.