8th September 2018 We purchased a full day trip to the Hoover Dam with Lake Mead cruise for the last day of our scheduled trip to celebrate our wedding anniversary. This we had booked several months in advance so we had been really looking forward to the trip for some time. 24 hours prior to the trip we contacted Viator booking office as detailed on the tickets to confirm our booking to be told we would be picked up by a Gray Line minibus at 9 am in the Valet area of another hotel in the area as our hotel was not on the pick-up line. On the day of the tour we arrived at the designated correct pick up place 45mins before the due pick-up time. At 9.15 am we still had not been picked up and so called the office only to be told they had contacted the bus driver who said he had been running late but had pulled into the valet area and waited 5 mins and that we had now missed him by 4 minutes. This is a complete untruth told by the driver as we later confirmed with the hotel’s CCTV no Gray Line bus had pulled into the valet area during the hour we had been waiting. He had not entered the valet area of the hotel at all. They refused to send him back for us or for us to be picked up at another location. Viator then told us we could now only be booked onto the 12.15 half day trip but we would not be able to do the Lake Mead cruise. So we transferred to this as it was our last day and wanted to see the dam. We again confirmed all the same pick-up details and time. The minibus only arrived at the pick-up location following another phone call from us at 12.15. When the minibus arrived at the same pick-up location we had been waiting at in the morning we asked the driver why he had not called on the morning route to pick us up only to be literally shouted at angrily by the driver in front of all the other bus passengers. He said we would need to take our complaint up with Viator, he wasn’t interested and just demanded us to show him our ID or we were not getting on the bus. So we got on the bus only to be ferried to another Gray Line waiting location where we then waited another 20mins before being transferred onto another bus. Later we learnt that quite often if the bus driver is running late on his pick up round he will just miss out certain pick ups so as to arrive at the Gray Line booking-in terminal on time! Once he is here he then spends 20 mins or so just chatting to other colleagues and eating croissants!! The rest of the tour was disappointingly less than great, we spent most of the afternoon picking up and dropping people off and once at the dam we were rushed to ensuring we completed the dam tour quickly as we only had 1.5 hours to explore before we MUST be back on the bus or be left. It is evident from the countless poor reviews we have since read that there is a re-occurring theme of poor service throughout and it is obvious this company are totally less than interested in learning from the comments made by their dissatisfied customers but instead only want to acquire your money and an ever-building bad reputation.