My first 24 hours with iTunes Radio are not encouraging. With regard to desktop functionality on my Mac, there is no way to like or dislike a song. This is the key reason I use Pandora, and if they don’t add this lickity split there will be a problem.
On my iPhone, some of my stations allow me to select “play more like this” or “never play this song,” but others do not; the option appears, but nothing happens when you attempt to select it. The big problem, however, is that songs play repetitively….I mean back to back. I just heard Round Here by the Counting Crows three times in a row. Other songs are replayed after just a couple of songs.