During the last 12 years we were never be disappointed by the tours booked by Viator, but this time we were surprised by the failure to comply the predefined schedule. On Viator site it is mentioned that the walking tour, including the visit of St. Johns's co-cathedral, it contains also a little pass through La Valletta harbor on a traditional harbor boat and an audiovisual show about Malta's history. In stead of that after visiting Barracca Gardens and St. Johns's co-cathedral (were the guide did not accompanied us) our guide sad good-by to us. Actually we have spent with her about 1.5-Hour instead of 3.5-Hour. When we have claimed these discrepancies she told us that maybe we had to go on another tour but she picked-up us from the hotel based on our voucher with a certain booking reference number. She was entitled to accept us or not depending on these coordinates.