I cant comment on the platinum end of things,but I did stay there 3 times and with no complaints.The rooms are lovely.We had no issues with the air con,it was pleasantly cool given that outside was 30c plus.
Try to get a room with a terrace that you can sit out on,overlooking the med.
The hotels location is a big bonus being at the flower market end of the palais d'anglais (sorry for the spelling)
That means you are close to everything central and can go out have a meal,drink in the pubs and clubs around the flower market and still be a 10 min walk or less from your hotel room.
You will not need a taxi which in Nice are very very expensive.
We stayed once in the raddison and well its at the airport end of the palais d'anglais (1.5 miles up the road) and a taxi one way to the flower market was €20
Never again