We had Sirius for free bout 2 1/2 years ago when my wife got her new Lincoln. At the time I thought Sirius sounded pretty bad (about the same as XM), very compressed. I recently bought a new Infiniti, and it came with XM radio. XM still sounds pretty bad to me, but they offered me a really good price, and I figured what the heck. Last week, I got an email from Sirius, offering to reconnect my wife's radio for $20 for five months, and no connection fee. Once again I figured, what the heck, might as well for $4/mth. Once the radio was back on, I could not believe how awful it sounded. Sirius now sounds MUCH worse than XM. I'm guessing they've added even MORE channels to a system that was already way over taxed, causing them to have to compress the audio even more. Sirius even added insult to injury when they came up with mobile tv. I can't even imagine how much bandwidth that is taking away from the audio. My advice would be to either not subscribe to satellite radio at all, or opt for the lesser of the two evils (XM). Sirius isn't worth even $4/mth.
When I called to cancel the 5 month deal, they offered me an extra 2 months for free if I would stay on. The lady on the phone did not seem surprised at all to hear that the audio quality is terrible. I'm assuming they get that all the time.