It works fairly well an can produce a decent amount of volume. The system itself suffers from an overly boosted amount of midbass to compensate for the complete lack of sub bass. The imaging is overall nice and upfront, but a lacks focus, common for a system than it playing most of it's mids and high into the windshield. My biggest gripe is that tonal quality is poor, intstruments don't really sound like what they are supposed to be. I'm not sure if it has more to do with the processing of the unit, pre-set in car equalization, speaker quality or speaker placement. If I felt like the head unit could produce a clean enough un-equalized signal would consider building a system off of it. The NAV is acceptable, I think it's biggest lack is is its inability to re-route well. Some system will you to take a u-turn RIGHT NOW when you miss a turn, this system will just causally route you ten miles out of the way. A good system finds the middle ground.