The guide was good, but the rest of the tourists on the bus were Italian, so we could not hear anything the English-speaking guide said on the bus. The tour should have been equipped with audio devices like other Viator tours. The content of the tour was interesting, nevertheless.
We are so glad we went on this tour, the Last Supper is truly a masterpiece. Our tour guide was not very animated/entertaining when compared to other tour guides we've met on tours booked through Viator.