I like it, but I'm not sure how the music gets chosen and it is frustrating me.

I sometimes use it for the 10 minute commute to daycare. My station is "Spongebob Squarepants", which quickly morphed into "The Chipmunk Christmas song channel". (That's when I found out about the six skip limit.) After I started giving thumbs downs to anything Chipmunk, it switched to the Disney soundtrack channel.
I would get a Spongebob song about once a week, and that's what I didn't like about it. I named it Spongebob because I wanted a high ratio of Spongebob with some other songs filled in. (If I wanted 100% Spongebob, I'd just play the CD.

)
I haven't used it in a while, but after another round of changing thumbs ups to thumbs downs, it is now becoming the kids songs channel, which is better, but still not what I had wanted.
I'm thinking of paying for the service just to get past the skip limit.
I'm playing Christmas music now (not by Pandora) but I'll probably pick it up again over the holidays and see if I can figure out how to make it do what I want. Some (not all) of my other stations play lots of songs by my named artists and I don't know why it choses the songs that it does.