I've been using PianoPub for a while now, and one annoying bug that I've noticed is that it doesn't remember your volume settings. Every time you restart the app, the volume resets to default, which is way too loud for me. Additionally, PianoPub really doesn't offer any way to view song info, which is a bit disappointing. Otherwise, I like it.

Pianopub isn't the prettiest Pandora player I've seen, but since Anesidora no longer works for me, it's good enough. Also, it seems to skip ads, which is nice.