We wanted to visit the My Son site. Our hotel, the Huy Hoang River Hotel booked the tour for us at Camel Travel Agency. the tour was 7 USD with return by boat with lunch included.
In the bus, the guide introduced the tour and said that he will collect the entry fees 100 000 VND, in order to avoid wasting time in queuing.
Most of the travelers were foreigners, and I was traveling with 2 French friends and a Vietnamese friend; my Vietnamese friend was speaking to me and just said she was disappointed that the guide does not translate the comments in Vietnamese.
The guide heard her and begins to argue with her, saying that she does not deserve traveling with people of this bus. He also talked very loudly and rudely.
Then he collected the money from the other travelers, but not from us. When we arrive at the site, we bought the tickets by ourselves, and it was only 60 000 VND. Then a traveler asked the guide why they had to pay 100 000 VND whereas we (my friend and I) bought them only 60 000 VND. The guide replied briefly and rudely because the price is different for locals and foreigners. Then he only shows one ticket with the price of 100 000 VND, but did not give the entry tickets to the travelers.
After the visit, we arrive to the place to take the boat for the return. They served us a plate of rice with few leaves of vegetables, and a half of tofu. It's what they call the lunch.
One tip: Ask your hotel the name of the tour operator before booking, and search the reviews on internet to avoid this kind of bad surprise.