Disappointing Service. I should have read the many unfavourable reviews on Viator , to avoid a disappointing and an unpleasant experience. I will not be using Viator again. I had signed up a tour package for two with Viator’s local operator, MTM Tourism Greece OE (MTM), for a trip, paying a premium, to be picked up at my hotel. Viator had confirmed pickup at the hotel. I waited at the hotel but to no avail. The receptionist at the hotel helped me to call MTM. MTM just told us that we were considered as ‘No Show’. I wrote to Viator, with ticket confirming the pick up at our hotel, and they refused to refund us. I have been travelling frequently and have not encountered such an unpleasant experience before.