Google is offering free Google Play Music Unlimited for four months as part of a July 4th promotion. This is very similar to Spotify’s on-going summer promotion which—depending on when you jumped on it—will take you into the middle of fall.
Given that the Google Play Music Unlimited promotion runs just for the July 4th weekend, you’re looking at access to the service until November. The service is actually no different from a lot of other streaming music services out there. If you get the premium version you get access to a large amount of tunes, no ads, and you can listen to saved albums offline when you wish.
The main differences among these services are what albums are available for streaming and what artists are on the service. You might be able to find one fairly obscure or somewhat known band on one service, but not on another. One service might just have all the popular acts while another will have a mix and actually encourage your music discovery journey.
At any rate, Google is giving potential subscribers four months free before things switch over to $9.99 a month. It’s a promotion worth taking advantage of and who knows you might actual enjoy the interface. If you’re still on the fence, try it out but set an alarm for you to cancel the service at a certain time so that you’re not charged.