Myself and my boyfriend went on a trip to Hong Kong and Beijing about 2 years ago with the Travel Dept. We found it to be a fantastic experience and we would definitely recommend it to others.
The hotels (Hong Kong Harbour Plaza and Presidential Plaza in Beijing) in both cities were amazing, luxurious and with meals, tours etc included in the price it was a great way to experience a new city that we may have found difficult to get around had we been left to our own devices!
The tour guides were brilliant, perfect English and our guide in Beijing even had some Irish and played rebel songs on our trip back from the Great Wall!
We saw so much (Great Wall, Forbidden City, many temples, Tiananmen Square, Lantau Island, even a fantastic play in the Red Theatre) in such a short time (10 days if memory serves) I felt I needed another holiday just to get over it all!
A colleague has recently taken a similar trip (Beijing, Xian and Shanghai) with TD and also had a very positive experience.