Great Diamond Upgrade
I booked a simple king den. Based on photos online it has a bed and a seating area in one room. I was upgraded to a one-bedroom suite with a river view. The living room had a couch separated from the kitchenette by a tall island for eating. The bedroom in a separate room.
The place is so new that it's probably the nicest Hyatt House I'd stayed in. The furnishing and fixtures are nice. The staff is thoughtful and friendly. I'd return anytime.