The tour itself is great, but the company that run...

The tour itself is great, but the company that runs it is a disgrace. We waited 2hrs to get on the boat, and then another 2hrs to get out. This is because the entrance is connected to the boat by elevators only. So when 2/4 elevators were broken, 500 people had to wait in the sun for 2hrs in order for the remaining elevators to take them to the exit. Two people fainted because of the heat, but still the company couldn't be bothered to bring us some water while we were waiting. Moreover, they were still letting more people in, even though 500 of us were already trapped between the boat and the exit.

To add insult to injury, there are stairs that go only halfway up to the exit. They could easily extend the stairs all the way up, thus providing an alternate/emergency exit. But they prefer to keep visitors reliant on the elevators, despite the health hazard.