XM Radio

I found this promotional code to get three free months AND waived activation fee (a total savings of about $50) on XM Radio. R has been bugging me for a few months to get this--and until now, I just couldn't justify adding yet another monthly bill (no matter how "small"). But, R's been going down to Gulfport (for work) at least once a week for the past 3 weeks, and I know that the Talk Radio he likes will help to keep him (safely) on the road. Besides, even if we do realize that we don't use it as much as he thinks we will, it's free. For THREE months.
Do any of y'all have XM (or any satellite) radio? Do you like it? What are your favorite programs to listen to? If you don't have it, but are considering--maybe, if you ask me real nice, I might share my promo code...
Sorry for posting so blah today, it's just been a rough day and I still have to get the laundry done (at the laundrymat).