There's no right answer when it comes to which music streaming service to choose.
Apple Music: Has family plan, twice the upload allowance of GPM, much more reliable uploading via iTunes and by far the best library management of them all. Audio quality might be the best too despite the 256~Kbps bitrate, but that's my subjective opinion (not that a lot of this isn't too). Curated playlists are available but mostly aren't good. Auto stations are dreadful - broken even. Definitely a service for musical 'hoarders' rather than 'nomads'.
Play Music: Also has family plan, pretty good upload allowance, the best auto stations and the best Android integration. Can be laggy on iOS. Hardly any curated playlists. Will eventually become YouTube Music, which will have by far the largest catalogue and remove ads from YouTube on all your devices. A very good middle-of-the-road option that should appeal to most users.
Spotify: No family plan in SA yet, and doesn't allow for uploads. Auto stations aren't bad, but not close to GPM. Desktop app leaves a lot to be desired, as does the web app. However, the curated playlist selection is vast and epically awesome. Discover Weekly and Release Radar, which are personalised for you and update on Mondays and Fridays respectively, are legendary for how great they are.
Deezer, Simfy etc.: No. Why bother. They may not be godawful, but the competition is better at the same price.
The Apple Music app on Android is terrible when I used it on my LG G3, always had issues.
But AM on apple devices is a pleasure, actually they all work well on IOS I feel.
These days I find the opposite is true. I think the Android app (since the major refresh a few months after its release) has a very user-friendly design and packs loads of features. It is a little sluggish in terms of responsiveness, but it's not a huge deal. On the other hand, the Music app for iOS really sucks imo. The layout is nonsensical and my folks, both of whom rely heavily on their iPad, struggle constantly while navigating it.
Spotify Free is always still available to you....it's why I would never bother paying for it.
Apple Music all the way.
Apple Music would be awful for many people. I definitely wouldn't recommend it to anyone without getting a feel for their needs.