We booked an ice cave trip through Viator. No one showed up to take us on the tour. We had looked forward to this trip for more than a year. Viator admitted they failed to tell the tour operator we had booked the trip. Later Viator customer service emailed us contract provisions they said meant Viator wasn't responsible for anything and that we should contact the tour operator if we were unhappy that no one picked us up for the tour. Missing this tour ruined our entire vacation. I would never trust Viator again. Viator is quick to take your money but doesn't stand by any of their promises and blames everything on the tour operator they selected.