I downloaded Spotify for my computer a little while ago. And I've been playing with it ever since. It's interesting--you can stream most any song for free.
I thought I would have a problem with not having a copy of the song on my hard drive but that's not such a big deal. Where I feel the program falls short is in the selection avalable. I never thought I would complain about this, but there is just too damn much to listen to. It's cool because you can dive into bands that sound like your favorite music or bands that inspire your favorite musicians, but that's all manual.
I like Pandora because I can set up a station and it pulls songs for me. Sometimes I hate the song and it doesn't fit, but sometimes I hear something I've never listened to before. It's that discovery that I really miss in Spotify. There doesn't seem to be any way to automatically sift though all the selection and just play random. Instead I have to use my own music or find my own favorite songs and that's not really what I want.