1. I DO NOT regularly listen to Pat Benetar, just happened to be playing on the 80's channel (dating myself here).
2. It is not very visible from outside of the car at all. Since the dash curves down, it sits somewhat in, and the gearshift hides it as well when it is in park. Truthfully it doesn't really matter much since the antenna on the car screams steal me anyway. But, I need it outside for the reception (haven't suffered from a drop out yet), it doesn't work nearly as well inside of the car. Personally I don't care it is really visible. First of all it was cheaper than most head units are. Secondly it is only the control panel, the receiver is in the trunk. The CD receiver in my truck is much more visible than this XM is, I have never had a problem.
3. I have the Mach stereo with the CD changer input. I also have the factory changer installed. I am going to order an aux adapter that will allow me to access the CD input with the XM radio as well as the CD changer. There are two adapters, one made by PIE and one made by Blitzsafe. The PIE adapter allows you to attach THREE devices and uses a toggle switch located in the cabin to switch between devices. The Blitzsafe (the dual mode one) allows you to toggle between TWO devices using the facory CD button on the radio. I want to get the Blitzsafe one, it is the consensus of many it is of better quality, and I also like to be able to use the factory controls and not have to put another control device in the cabin. But the dual mode Blitzsafe isn't available for our cars yet.
4. I tried to velcro it onto the ash tray, but it wouldn't stay since I actually use the control panel. I used double sided stickey tape to secure it.