I've been using this unit for about 8 months now. It's got a lot of features, but controls seem cheap. My touch screen stopped working so I have to send it back for repair or for a replacement. But i noticed when I stop the car and restart, the unit sometimes comes on and off a few times. The power button was unresponsive a lot of the times while this was going on. Not sure if this is the adapter you have to buy to prevent this. Navigation unit and stereo worked good. Bluetooth you have to scream into the built in mic like someone already stated, not sure if they were using the external mic. I tried my external mic but it didn't work. I need to check the install of that, might be my fault, might have nicked a wire, so I can't blame anyone just yet. The DVD/CD player has some kind of motor running noise at low volume I can hear. Was told to check for a grounded sub amp cable but did not have a chance to check before the Touch screen went dead / frozen. Also when you remove the DVD/CD they come out hot. Even with all the problems I love the unit and the controls seem cheep but you pay for what you get I guess. The touch screen freezing is a problem and came at a bad time coming back from vacation, but maybe got a lemon. We will see when I get a replacement.