Wagner's music and dramas are not for everyone and even seasoned opera goers might feel intimidated by the master. But "Tristan und Isolde" is an opera that needs to be experienced by anyone and everyone, even those who have never gone to the opera. Despite its 4-plus hour running time, this is an opera that immerses emotionally, spiritually and even physically and the Met's production, featuring intelligent direction, a terrific cast and genius conductor is simply too perfect an opportunity to pass up.