That's ok. My post died quickly and it is a worthy topic.
What I like about it is that, unlike say live365.com, or Sirius or XM radio, you can CHOOSE the songs you like. YOU are in control.
You create a station for say, Tangerine Dream, and then they not only play songs by that group but songs by groups that SOUND SIMILAR to that group.
Thus, you get to hear new music, but it's music in a vein you'll enjoy. And if you don't enjoy it, you can tell them "I don't like this" and they don't play that one again.
Really nifty.