It works. It looks good. But there is no way to completely exit the app unless you sign out! If you back up it says it's exiting. But it's not. It's just paused. When you wake the phone up, there is a mini control panel right where you can accidentally touch it and bam, you're playing music in the middle of a meeting when what you wanted to do was open a note taking app. Ask me how I know that. Go ahead. In Android and iOS when you exit the app you EXIT THE APP and there are no little noise traps waiting for you. Then to restart it you don't have to re sign-in, you just touch the icon. Bad design choice guys.
Even worse, if you're bluetooth connected, when you connect or disconnect BT, it toggles. If playing and you turn off the BT device (or leave its range), play will stop. But the next time you connect to a BT device, it will start playing automatically. If you've already stopped play, and the BT disconnects, play will resume through the phone speaker, unsolicited.
But don't blame the Pandora app. It is this way with other music-playing apps as well. XBox Music, Nokia Music, some podcast players..... I've been told by a developer of one of the podcast aggregators that this is a "feature" of the OS, and that in order to prevent it, developers have had to use an undocumented workaround. So don't blame the app for this one, blame the OS.
There are a couple of apps that will stop the music - search for "stop music" in the store. The one I'm using is called
STOP Music, and what I like about it is that from within the app, you can pin a secondary tile, and that tile, when you tap it, just stops the music. It doesn't open the app. Well, kinda. It opens the app to a black screen, stops the music, and then throws an exception to close back to the start screen. Throwing an unhandled exception (a programming error) isn't in compliance with the app certification guidelines, so I'm not sure how he got it to pass certification, but in a case like this one, I don't have a problem with it.