Yeah, it is from the Galaxy app store, but to answer your question, yes, I use it. It is probably my least-used panel, since I don't really have widgets that I would prefer to have in the panel instead of on a home page. So, on the panel, I just have a dumb date/time widget that I made in Zooper (just trying it out and I will eventually change it), a slideshow, the icon for the thing where Google tells you what song you're hearing (basically only because I didn't want to leave the space blank), the voicemail icon, and the Google Voice widget. (I recently changed this and used to have it the slideshow, wake-up alarm, voicemail icon, Google Drive icon, and Beep'nGo widget.)