We took Airport Limousine bus from NRT to Park Hyatt Tokyo. The cost is 3000 Yen each, but for extra 100 yen, you can get 1 day metro pass, so make sure to ask NRT bus ticket counter Metro pass combo.
The bus dropped us off at front entrance, there were several hotel employees waiting, then brought us to the hotel lobby, which is located on 41st floor. From 2nd-39th floor are office building with separate entrance, and a Japanese restaurant on 40th floor.
After exit the elevator, there was a Lobby Lounge, then pass another western restaurant and library, we arrived lobby. There were only three desks like concierge desk in the lobby, so check process completed while sitting there.
Our room is on the 47th floor, the view is overlooking Shinjuku Park.
Hotel has Free shuttle every 20 mins to Shinjuku Station, you can take subway/JR from there or you can walk to lots of great places around that area.
I did not eat in hotel restaurants. With so many great Japanese restaurant downstairs, why bother to eat in the hotel.
The service was great, I left 2 laptop on Airport Limousine bus, but the front desk people found back for me after 2 hours. I think this hotel provided the best value for my Hyatt special promotional free nights certificate.