I've been using Deezer since Tidal dropped Plex support. So far the library seems to be the same as Spotify, at least I wasn't missing too many songs when transferring my Spotify playlists in.

I like the built-in song identifier and radio station support. The song quizes are a little gimmicky, but kinda fun. I probably haven't used it enough for recommendations to get me down, but so far nothing crazy has popped up there.

I'm not sure if it's just my phone, but every couple days when I first launch the app, I need to close and reopen it to get it to load, my desktop app constantly throws up a banner saying the app is offline, but it doesn't actually effect functionality, so it's just annoying more than anything.