I'm considering Beats Music. Anyone else a subscriber?

I know this isn't technically Apple, but close enough.

I've been using Beats on free trial and I'm very impressed. I haven't used any streaming service in any meaningful way, but Beats might be enough for me to spend the money.

I'm curios what other people think about it. I know it's not the most popular service, and I'm guessing that's just because it's late to the party. Also, if you are using something other than Beats, what are the things that are keeping you from leaving?