DBF and I went in August and it was really fun. We went on a Sunday night, I think, because I heard it gets really crowded but there were only like 6 other tables of people. We were there with the piano players by ourselves for a good 1/2 hour they chatted with us and they played whatever we wanted. Once it got more crowded, people put their requests on napkins and then bring them up. There were actually quite a few songs that they said they couldn't do. They were very interactive, though, and one of the piano players even bought DBF and I a round of drinks because we were they all night! They would switch every once in a while between two sets of players, which was nice because they all sounded different and could play different style songs. I wouldn't really say they're "dueling" pianos, they just kind of play together. There is a cover charge and it is the only place in WDW that you can smoke inside, if that has any effect on your decision to go. We will definitely go there again!