I got satellite radio about a year ago. If you've had your head buried in the sand for the past decade, it's a subscription service where you get several dozen channels of music and talk content. Because the content is broadcast from satellites, you can receive the service even in very rural areas. (In fact, reception in downtown areas of cities can sometimes be a problem, although larger cities have terrestrial retransmitters to solve the problem. Alas, Regina is not one of these larger cities.
Despite this, I'm really enjoying the experience. I'm using XM Satellite Radio. It has a huge variety of music. I'm told that the audio quality is slightly better than the competitor's, especially on audio channels (I have to test this myself). XM has all NHL and major league baseball games, which I like a lot since I follow the Blue Jays. It's been handy during the playoffs because no local channel has the playoff games.
The competitor is Sirius. In some ways it's better: its satellites are higher in the sky, which permits reception in areas of taller buildings or mountains. However, the satellites move in the sky (XM's are geostationary, and are in the same place all the time), so if you're using a home receiver, you can't just put your antenna at a south window and expect reception to stay good like you can with XM. Sirius carries the NFL, NBA and CFL. Sirius will have NHL games for this season but after this season, XM has the exclusive rights. I don't know if Sirius has all the NHL games this year the way XM does. Sirius also has CBC, although most of the CBC channels can be received over the air as well.
So should you get it? If you're in your car a lot and like music but don't always want to listen to CD, it's great. If you hate commercial radio as I am coming to do, it's great. If you like a huge variety of music or want to try some new genres, it's great. Unfortunately, with the exception of the Sirius CBC channels, Canadian content is rather horrible (the Canadian news channel on XM is of horrible quality, both technically and content-wise). Then again, that's what the CBC news website is for, right?
I'm really happy with satellite radio and I plan to keep it. (My receiver is integrated with my car receiver, so even though there is a box in the car to get satellite radio, you don't really know that - it's like using broadcast radio.) My favourite XM channels so far: 26 (Flight 26), a current music adult contemporary channel, and 175 (MLB 24/7), a talk channel exclusively about major league baseball. This latter channel alone makes me wish I had a receiver I could use in the house.