I stayed at the hotel for 4 nights. The space was good and I appreciated the view. The staff had a limited command of English but I don't count this against the hotel (you're in the middle of Beijing after all) but I note it for non-Mandarin speakers. My main criticisms of the hotel are:
1. No 'do-not-disturb' signs. While I was adjusting to the time change, I was woken up several days/times by the maid service. I had no way to indicate to them not to clean the room and they were very persistent in ringing the bell. The first day, the maid argued with me and did not want to go away when I asked her to come back later.
2. On my final night, I spoke the concierge to arrange a cab to take me to the airport the next day. When I checked-out the next day, they had no record of my arrangements - it turned out not to be a big deal since I was able to get a cab in a few minutes but it could have turned into a real hassle.