I don't have the radio directly installed, but I did buy a Kenwood portable unit for my office. We were tired of hearing commercials. Anyway, since it's portable, I decided to get the car kit. I love it!!!!!!!! Talk about finding everything you need without the commercials. Hell, you can even listen to T.V. Don't need to keep switching stations when you go on long trips either.
Like I said, the sirius radio is pretty cool, but I only have the portable unit. How much does it cost to have it already installed into the car? I paid about $200 for the radio and the car kit. Let me know how much the option is.