Seems like it might be worth a try. Always great to have more competition. Now we have iTunes, Amazon, and Google fighting it out. Nice! :boxing
http://www.washingtonpost.com/business/google-unveils-music-service-challenging-dominance-of-itunes/2011/11/17/gIQA8gWNUN_story.html (http://www.washingtonpost.com/business/google-unveils-music-service-challenging-dominance-of-itunes/2011/11/17/gIQA8gWNUN_story.html)
http://www.informationweek.com/news/cloud-computing/platform/231903210 (http://www.informationweek.com/news/cloud-computing/platform/231903210)
Nice comparison of Google Music and iTunes at the link below. It looks like you can also easily access Google Music via your iOS device.
http://www.mercurynews.com/business/ci_19359559 (http://www.mercurynews.com/business/ci_19359559)
Interesting in as far as the differences between Apple's 'match' model and Google's 'upload' model are highlighted.
I'm not surprised iDevices can use the google service since it boils down to little more than a web interface.
I'm old fashioned. I keep music on my device.
(I wouldn't want the network costs/battery hit from streaming)