So im guessing you're looking for an apple music customers opinion and not the opinion of an artist who has music on there.
Apple music is kind of like spotify except that it is something that works natively on your apple device (iphone, ipad, itunes) as a service that is enabled as part of the music app, whereas spotify is an app that can be downloaded on either apple or android or windows devices, or run in a browser. They both offer searching, playlists, channels, etc. Spotify has a better social aspect with facebook integration.
As a customer Ive found that for what it is, i'd say its cheap and worth the money for reasons that are different to spotify. The advantages of apple music are that it integrates with your itunes playlists, and can be used in your home apple ecosystem (airplay on apple tv/other devices over wifi). You can save the music on your phone offline, you cant properly rip the music (same with spotify). The disadvantages are that I found it buggy in that it didnt always save music to my playlists, and sometimes would not connect or play at all without restarting my phone. You might say that its to be expected because its a new service though.
Spotify has the advantage that its more cross platform and has a web site version of the client, and that it is less buggy. You can also use spotify without paying if you're happy with the annoying adverts that sometimes cause the client to break. I ended up going back to spotify after a bad experience with my iphone 6S plus breaking, and apple music not saving my playlists properly even when it worked, but i may try apple music again in the future.