I love Pandora. I love that my weird, eclectic taste can be made into a playlist that fits my mood. I love that I can listed to one artist almost exclusively if I want to. And I love that I can do all of this on my phone.
Granted, the fact that multitasking isn't available yet (but soon, very soon) makes this app a little less worthwhile than it could be. That said, I use it at the gym or when I'm not really messing around with my phone so it's not a huge deal. It still would be nice to be able to text someone or check emails.
The app works just like the website from what I've seen so if you like Pandora you'll want this app. And if you have weird music tastes then this app is a must.