Google play music is one of the common app that use to listen music.there is some features but they need to update that and remove some problems related playlists etc. It is very good option to listen songs when you are travelling and also it is less battery consuming.
Other nice feature is design and layout of Google play music because it is so attractive and beautiful like it show you name of song with one photo related that song. Songs are divided by like latest played etc. They want to need some other work on application but overall nice app.