EDIT: The only reason why I still had it at this point was because I could use it with other apps. However, now that my Spotify Subscription is cancelled, it doesn't work with anything. It's mildly infuriating because today, I can't still use it with other apps like I was able to yesterday.
Please don't make the same mistake I made. No one should buy this.
Now there is an actually sensible product: A phone holder with nice hardware buttons, exposed to the phone as a USB keyboard.
I’ve got a bluetooth steering wheel control (add on for ~$15) that adds play, pause, volume control, and next/previous track.