Questions regarding Sirius XM.

I am so sick of commercials on the radio, as well as hearing the same 80 songs over & over & over again.

All of my Daily rides have Sirius XM capability, and I've been looking into it a bit, but I have a few questions for those who have experience with it, such as:

1. Are there really no ads? I'd be pretty PO'd if I bought into the marketing on their website that says "ad-free", only to hear even more commercials. (Remember when cable TV had no commercials?)
2. Does the coverage "go south" in bad weather, much like satellite TV/internet does during heavy clouds/storms?
3. Is the coverage truly nationwide?
4. Has pricing been stable, or has it been going up over time?
5. Anyone ever paid attention to the quality of the audio? I like jazz, but as a self-proclaimed "recovering audio-fool", I have a hard time listening to it when it's compressed/MP3 "quality" (note the sarcasm there).

I'm sure there are more, but this is all I can think of at the moment.

Thanks!

Jim