I stayed only one night in this fanatstic 5 star hotel in Beijing. They have on the top floor a very nice swimming pool as well as Sauna. In the lower level is also a very good SpA-area. I am wondering why somebody would need two Spa's in one hotel?
Nonetheless I would book again provided the price would be a bit less than RMB 3000 per night ++.
The location is good but other hotels such as the Hilton Wangfujing have a better location but not such a nice Spa. The rooms are very big and really nice - no disappointment. Service in a Park Hyatt is always exceptional without any problems.