I have purchased a subscription with this App. It was working perfectly in my 1st handset allowing me to download songs. store it even on my external storage. Also there was something such as low internet speed usage where less internet was used in low speed. I liked the app. But the time when I switched my handset the support of the app was like hell. my subscription used to get deactivated again and again. also the online playing of song with less speed internet was worst.
The worst feature of all in the App is that is if you have kept a single app in playlist and on loop it loads and uses up Data every time to play.
Would recommend you to go for some other app if you want to spend money.