I have been a subscription music user since the early days of the model. I was a Yahoo music subscriber but then Yahoo discontinued that service. Overall I'm pretty happy with the service. It's not radically different from Yahoo Music and that's a good thing.
A couple of little nits. I listen to a 'customized' streaming radio station a lot. What I don't like is there is no 'history' feature. I frequently hear something I like but by the time I switch over to the player, the song is over and I can't see what had just played. Also, I really like the idea of being able to mark songs 'never play again for me'. With Rhapsody that feature doesn't appear to work, or if it does, just not always. I mark songs as 'never play again' and yet, they show up again.
Overall, I'm a happy music subscriber. I haven't purchased a CD or song in...too many years for me to remember now.