It was amazing day tour with vaitors from Zurich to Jungfrau. Initially I booked my tour till Interlaken; on reaching there, I decided to go further till Jungfrau. My experience with Viator was good, as the tour was conducted in a good double Decker bus. The driver and the tour guide were very friendly. We had a tour guide from Thailand, who was very jovial and kept us entertaining all way the tour. The total tour duration was for 11 hrs and it was a good experience. If you happened to be in Zurich, Jungfrau is the place to visit. I am well satisfied with Viator tour, value for money.