Is this card worth buying. The website shows English as an option but only the basic info is in English so I am not quite certain what the card actually does for you. It looks like some museums are free with the card but others, not so clear about them. Do you get a discount with the card? We are going to visit the Capitoline and take advantage of the Torlonia Marbles exhibition. We also plan on going to Trajan's Markets. A visit to the Museum of the Walls is an outside possibility. Any advice appreciated. Thanks!