I don't really know much about Spotify. What makes it better than some of the music streaming services already out there?
Streaming music is just one more thing that makes Verizon's new limited data plans suck.
Pretty much just because it's free. And the interface is pretty simple. The $10/month version untethers the music from your computer and lets you play it on mobile devices. I'll probably just use the free version to discover new music. If I find a song I like, there are, uh, other ways to acquire it and take it mobile.