Instruct: Classify Amazon reviews into positive or negative sentiment
Query: "Authentic"? George Gershwin?

I was instantly dissapointed in the mechanical, yet inaccurate rhythms. His interpretation of piano roll performances is not accurate because the beat is not even. In his non-piano roll performances, there is still a lot of unevenness, and it is hard to hear the beat. In those wonderful Gershwin syncopations that trick you, he is tricked and doesn't maintain the proper rhythm. The "American in Paris" is perhaps the most interesting, and shows the most artistic playing, although it still lacks subtlety. I would have prefered to hear the actual piano rolls as mechanical as they are, or other old recordings, and have a better idea of what was really happening in the music.