The hotel was lovely, comfortable and clean. Ideally situated and warm.
The air conditioning kept me awake all night, and although they offered us another room (adjacent to one where they were playing music at around 3am) , it would have been a waste of time.
The aircon issue is a known issue down the end of the hotel where we stayed.
They offered us 40% off our next stay.
40% off another sleepless night? No thanks.
This was not indicative of other Mercures we’ve stayed at - the last one in Cologne was perfect.