Our pair of New York ingenus, Elizabeth Frayer and Shawn E Milnes, went to see Der Rosenkavalier for the first time. Hardened Marschallin fanciers may find their observations a tad naive. But they’ve found a useful way of getting i to the Met at weekends for little more than the price of a movie. You don’t want to read how they do it? Oh yes, you do. Read here. But be warned: you get what you pay for.