The building is beautiful and the rooms are nice. However, the building core systems power was unexpectedly off all night and morning, with no elevator service, no lights in stairwells, no way to unlock doors and no communication about any of this. I wasn't able to get to or use the amenities. Everything was locked and I was locked out of my room and my floor, had to go down a pitch black staircase out to the street with no way back in since the entry kiosk had no power. Very unusual for any building to have the hallway lighting, elevators and stairwells not energized, while the rooms are all fine. The many staff were polite and did their best to get us back to our rooms, this was a lot to handle.