Never ever will I ever have XM again. In my opinion, they are crooks. I had a free 3 month trial with my new vehicle. after it expired, they made me several offers, finally I took one, that was 5 months for the price of one month. After the 5 months, I called and cancelled the service, except XM wouldn't cancel the service, and they kept billing my credit card. This went on for months. XM would simply not cancel the service and kept charging my card. I finally had to dispute the charges on my credit card before XM did anything. I got part of my money back, but not all of it.
As far as the service itself, I only found a couple stations I liked, and every time I drove under a bunch of trees it cuts out. Today XM and Sirius are one and the same. I prefer to load up my MP3 player and use it.