I don't think you'll find out anything you not already know:

+ spotdl search is nice

+ tkinter surprisingly doesn't look as ugly as usual

- no rewind or fastforward, nigher is it possible to click somewhere in the track progress bar to jump to.

- "about" button does nothing

- /tmp is littered with covers cause they are created each time you click on a track

- if you first used <F8>/<F9> or the previous/next buttons and then you hit <space>, besides pause/play it causes a strange behavior: some random track in the playlist is get marked as an active one.

this project still has many issues and ill try to fix it