I just put a few hundred miles in our 04 Chevy SS silverado truck that has XM radio. The clarity, lack or talk and dozens of stations that never fade out are great. I want to put in my GTS. It will need a sat. antenna somewhere. It is well worth the $9.99 a month charge. I hate commercials , DJ blabber and carring a bunch of CD holders with me. I don't want a hole in my car for the antenna though.