My boss had just joined their tour to Hoi Nam of $499. He highly recommended us to join as it was very cheap. He said OK. 1 night 5 stars hotel and the other 4 nights 4 stars. He said OK. They did not force you to buy things. I think if you are adultes, it's worth to try as the air tickets are expensive than the tour price.
My boss also had joined them to Ching Tao for about $1000 odd. The point is the same - very cheap. He said that the firm has background of China and has money.