First, what music do you like? Theres only 2 good rap stations if you like rap but channel 67 is _really_ good.
No ads? only 20/100 stations are ad free but the stations that do have ads are like once every 20 mins and only 1-2 ads prolly On-star or directv.
SOUND QUALITY: AMAZING
I have XMPCR(XM PC reciever), AMAZING AMAZING SOUND.
There are some FM stations rebroadcasted into XM - not many. I know LA KISS in LA in rebroadcasted and they are a really good hit station.
During the holiday they were offering free activation but not sure if they are anymore. 10$ activation, 10$ monthly, 50$ equipment.
I rate it 9/10 and it would of got 10/10 but they billed me 10 days early once and my credit card was already maxed so i got a 40$ fee.
I know im getting XM Radio in my new car.
*Channel 67(rap,r&b) has like 4 DJs always doing their mixes. Hot stuff.
heres a screeny of their remote..i always dont like this open so if you alt-crt-del from it you can close the remote and listen to the radio while the pc is off.
http://img.villagephotos.com/p/2003-12/560569/xmradio.jpg*EDIT did i mention - MTV,VH1 has stations on there. Also Disney, CNN,MSNBC,CNET and other big companys have stations.