The company Mubus offers you a direct trip to the great wall without hassle or trying to sell you stuffs. Explanations are good and you get 5 hours to explore the wall which is plenty. What's most is that the meeting point is easy to find. On our tour Anne was our English speaking guide, she was always nice and available during the trip. She took care of all the logistics to help us get to the wall quickly avoiding queues for tickets, the shuttle etc. On the way back she answered a lot of questions related to the great wall and the mubus, but she was also available for tips and tricks about Beijing.It was super helpful. Overall the trip was really great and we recommend Mubus. Its more expensive than going by yourself but the advices and help are so helpful when you are on the clock.