We had a great guide Suzie in Thailand.Cambodia guide Narain was average, appeared disinterested to answer questions. Overall we enjoyed the tour. I suggest you should also arrange domestic flights for people who need. It helps to avoid carrying bags to international flights and avoid paying extra bag fees. Other tour companies do. China air is below arerage, less amenities and food very meager and poor quality. Vegetarians suffer. It’s my honest opinion. If domestic flights on same ticket will sign up for tours more I am sure. You should give some thought. Thanks.