We patiently waited for our tour. There was a football match in Frankfurt. When the tour guide arrived over 40 minutes late he gave us so much attitude. He was clearly upset about traffic, complaining about everything, he made us feel so uncomfortable that we did not want to go with him on a tour. At one point he said “you could not have picked a worst day to take a tour”. Are you kidding me? Additionally Viator never refunded us our money even after explaining this terrible experience. Nobody would have gotten in that van after that, hey take zero responsibility.