This plugin only appeals to a very, *very* niche crowd of people – that crowd being people who rearrange their system's UI to put a higher emphasis on tray icons. And as a member of this extremely niche demographic… it's not bad. It's a bit buggy sometimes, like it has a tendency to just occasionally crash Rhythmbox outright for no reason, and rarer, make the Sound applet think there's multiple Rhythmbox's, for some reason, but for just quickly pausing and unpausing Rhythmbox? It usually works well enough.