Random Thoughts on Music Services

I've tried a few of the more popular streaming music services recently, including Spotify, Rdio, and Google Play Music All Access (what a mouthful). Here's a few thoughts on each.

• Google Play Music has great sound quality, good music selection, a good UI, a reasonable recommendation system, and no iOS app.
• Rdio has really poor sound quality, a frustrating to use interface, a really poor recommendation system, but pretty extensive library availability. Rdio is, in my opinion, the obvious loser in this group.
• As much as Rdio is the obvious loser, Spotify is the clear winner here. Spotify has great sound quality (on extreme setting, anyway), a pretty good UI, a library that's slowly getting better. I can't stand some of Spotify's social aspects, and their recommendations are pretty bad.
• If Google Play Music had an iOS app, it'd be the clear winner for me. I'd also pay more for it than Spotify. For some reason, it just feels more premium.