Google play music is a very good app. We can listen to songs and radio. We can also search songs by typing songs name in it. We can also listen songs online. And in offline we can listen only downloaded or songs that are on phone only.
But it has several problems like it had monthly subscription which had so many great features. We can listen to audio only. If we start a radio channel e.g. bollywood hits then we can only listen to only up to 10 songs only without monthly subscription . when we listen to songs then the picture or photo album does not show full photo or show crop photo on Android.
But if you did not mind with such things then otherwise it is a very good app.