I already have Sirius in my Xterra, and was going to buy an extra car docking deck and antenna for my Dodge Dakota. Then I got the free offer from Howard Stern! So I ordered the free radio and antenna/docking station for the truck.Now I won't have to switch radios between the two vehicles. And, because I am already a Sirius subscriber, the additional monthly charge is only $6.99! Sweet! I've been very happy with Sirius, as many of you are with XM. No matter which one you get, it is great having no stupid commercials.....just clear, quality radio that offers something for everyone.