This is my second time seeing this show - saw it in Broadway at Easter. I cannot recommend it enough. It is so slickly done and the music is fantastic. Frankie Valli was 'before my time' but I know all the songs. It is superbly written and a fantistic show. I am already making arrangements to jump on a plane to get back over to London to see it in the new year!!
The only thing I would say that I didn't like was the fact that the main performers had their little microphones coming out from their hairlines which left them hanging halfway down their foreheads - very distracting! Mentioned this to other audience members at the interval but they didn't notice as they were sitting too far back from the stage.