They're trying too much to be an iProduct... the site is very bloated - not a big deal on my main PC, but I have an old athlon xp in my workout room and surfing in other tabs in between sets is sluggish with pandora going... the interface is really cheesy, I get long, apologetic messages about how sorry they are to have offended me by daring to play a song I thumbs-downed. I mean jesus, just play the damn music, if I wanted a rimjob I'd ask for it.
As for the music itself, meh. Too many replays, recommended similar artists never really seem to capture what I liked about the artist I put in. But for occasional listening, it's ok.