An airport hotel with free shuttle service, which I booked for my return from Tibet, as I was leaving China for Singapore the next day. The room was among the most economical, yet huge and comfortable.
The staff was accommodating to my late arrival. Only complaint was much too long waiting for the shuttle. Almost gave up and ordered a cab, then the driver arrived.
The next morning they let me stay an hour longer while I had a light snack. I was booked on Singapore Air the rest of my trip and knew I'd be well fed on my 6 hour fight.
The return shuttle arrived on time, and I saw, to my regret, a Subway restaurant at the end of the street, sadly closed when I arrived, but if only I had more time.
Really good hotel. I never asked if there was a subway nearby, as if there was it might be a good bet to get around Beijing. For the airport, superb.