Adding to the list of everything everyone has mentioned (which I also agree with), a major factor for me is the Zune Pass (and it the main point where I mention Apple is so terribly far behind). $10/mo for (quite nearly) the entire catalog. They have SmartDJ (I think Apple has the Genius Match or something? Similar idea) where you can pick a song and it will play similar songs to it. With the Zune Pass, it will pick songs from the Zune library as well, possibly songs you've never heard. It's great for finding new artists with a similar feel to the bands you love. Years back, this is how I found the Black Keys. Plugged Seven Nation Army into SmartDJ and there was Stack Shot Billy.
If you cancel, you lose access to the songs after 3 days, but each month you get 10 songs without DRM to download and keep forever. At 99c per song, you're basically paying for one album per month and getting the rest of the library for free. And if you're a little more creative, there are ways of making the songs "lose" their DRM.
If you cancel, you lose access to the songs after 3 days, but each month you get 10 songs without DRM to download and keep forever. At 99c per song, you're basically paying for one album per month and getting the rest of the library for free. And if you're a little more creative, there are ways of making the songs "lose" their DRM.