When Amazon first launched their Prime Service the only advantage was free 2 day delivery on your ordered merchandise. With the addition of Amazon music your $99 yearly subscription gets you the expedited delivery plus access to their 30,000 + video streaming library, one free kindle book a month and now access to the Amazon Music Library.
My wife would describe me as a casual music listener so I find Amazon Music a really great addition. What seems to me is an unlimited treasure trove of music to stream on my computer, iPad and Android Phone. Already I am overdosing on Johnny Cash, Spyra Gyra and Paul Simon. I have included two quick reviews below that describe some limitations on Amazon Music
There is a 30 day free trial for non Prime Users. For Prime Users Amazon Music is a No Brainer.