It's the 3rd version of this app that I'm trying (1.7.1, 1.8.3, 1.9.4).
It's still far from perfection.

You don't have the ability to change text color or background window color. It would be much appreciated cause the informations are almost unreadable, even with transparency set to 0, it's still transparent.
Some variable are still not working: you can't display the year or the length of the song in the main window. Maybe some other variables are not working but I didn't try it all.

A new feature could be cool: the window fade in and out when a new song is beginning. But maybe it's not the purpose of this app.