I am traveling with my family (2 adults, 2 teens) and will be in Beijing from the 22nd to the 28th of December. First, a hotel question--does anyone have expereicne with the hotels mentioned--I am a Marriott Platinum and would get good service and upgrades at any of these. Second, I am a seasoned traveler--any good advice on whether a guide is impotant in Beijing--I know where we want to go--will a guide add to the expereince? Lastly, airport pickup--any reason to arrange this in advance or is it fine to get a cab upon arrival? Thanks for your advice.