I live near this wonderful excavation. I visit the archeological site five/six times a year. I absoulutely suggest to visit it if you are in the surroundings. The villas are three (Villa San Marco, Villa Arianna and Nuovo Complesso) and they are different from the archelogical site in Pompei. The nearest stop is Via Nocera, by Circumvesuviana (via Sorrento) train.