I LOVE my XM radio!
I listen to a lot of the decades: '40s, '50s, '60s, '70s...(what can I say, I'm a geezer!)...and a lot of the Broadway channel.
Couple of things I do NOT like...the '60s channel is set up like a radio station from the 1960s...a bad one, with the DJ screaming and talking over the start and end of a song. We listened to the old radio program channel and a couple of the comedy channels during a recent trip and were surprised to hear a lot of advertising. I thought they had no advertising.
And Jimmy Buffett's Margaritaville channel (Buffett and TropRock music) is only on Sirius

.
Do
call and ask for the best deal paying a year at a time. My husband got the XM subscription for me for Christmas and only paid $77 for the year. Good deal!
Just wish I had it on a radio at work & home. XM's Web site sux...it's hard to figure anything out on it.