Pandora, paid subscription, any good?

I obviously use the free app on my i-phone which I find incredibly useful especially while driving. However, I use all my free hours each month. Honestly, I'd be willing to pay the $4 a month to have the full service with less commercials but I have concerns about their music choices and what seems to be the ineffectiveness of the "like" and "dislike" buttons. Not with all of my channels but with some. A good example is with the Ramones channel. It seems that over an hour of listening time they played ONE Ramones song! And trust me it can't be because of a lack of a library for that band because they were playing the Misfits (who I disliked many times and they continued to play!) What can paid subscribers tell me about the paid subscription to Pandora? Also, with paid subscriptions do you have more choices? For instance, I notice you can't play specific songs... Thanks!!