I have 4 people that use it on my account, it plays music just fine. Makes playlists, finds similar artist, View artist/album on long press, add to current list now or at the end, etc...
Actually has some interesting and unique features (like I can add stuff from youtube app or desktop even to a playlist and it will be in the playlist on TYM later on.)
For starters, it won't stop raping my data with video plays and downloads, even though I tell it not to do anything without wifi.
It also seems to 'shuffle' the same newest 40 songs or so, out of my 1000s of liked songs. Could never understand why, I just want random not algorithm random.
If I am on a 20 minutes drive I need the damn thing to keep playing music for 20 minutes, not just randomly stop playing halfway through a song. YTM does that. Spotify doesn't. Nor does my other background players.
I mean GPM was buggy too, but it was just unstable and slow. YTM just has boneheaded bugs. I've started running wearing a WearOS watch and it can't even list more than 100 albums in my library, so I can't download any albums alphabetically after Love Songs Drug Songs by the X Ambassadors.
I had a fun bug for awhile on GPM were playing my library on shuffle it would mostly play songs that started with P. A 30 minute car ride would have 3 songs that started with P and the other 5-6 would be more random.
Also the fact that the ongoing notification always disappears. YouTube and all other media playing stay there forever. A minute after I'm done playing music, it's like YTM was never there.