I'm using a Microsoft Lumia 640 LTE with Windows Phone 10.
The app doesn't work. Whenever I try to play a playlist or whatever, it either plays like one second of the song and then goes silent, or it doesn't do anything at all.
Also, navigating the menus is a constant stream of "resuming" prompts, it struggles loading playlists (it says it's impossible to load the playlist and to check my connection - the connection is fine), it crashes. It's just a general mess. 
The app is updated. I reinstalled it a billion times.  I wiped the phone and did a clean reinstall of WP10. Nope.
I'm on OS version 10.0.15025.1001 and Spotify App version is 5.2.4.0.

Oh and just to make it clear, this is not a case of "it worked just fine until it didn't", it never worked.