This is a very well done hotel overall. Apart from the cooling, the rooms are comfortable and my room (428) had a nice view and was quiet.
However, it seemed like the air conditioning was one of those that checks for people in the room, because it turned off when I went out (fine) and during the night (not fine). The windows do not open, so the air conditioning is very much needed to keep the room cool. Having it turn off overnight led to a poor night's sleep.