We chose to go a tour with Jessie because we had limited time in Beijing (less than 24 hours total) and wanted to go to the great wall, the summer palace and Tiananmen Square from 6AM to 2PM and then catch our flight at 4PM. Jessie was very responsive to email. She was also on time, and in fact early (despite the 6AM pickup time). She had great suggestions for pictures at each of the places she took us to, and it was interesting to talk to her about the nuances of the Chinese people and culture. Highly recommended, especially if you have limited time in Beijing.