Lovely hotel, but avoid room 630.
We had stayed at the Michelangelo before, and were expecting a nicely appointed, quiet room in a hotel with a great location near the Theater District. To our surprise, the front desk staff assigned us to a room that smelled terribly like mildew, room 630. When the bellman came up with our luggage (Joseph, very helpful), he was not surprised that we were changing rooms, and said he was sure we would like our new room better. Our new room was fine; nicely appointed and quiet, as we expected. 
The staff was very quick to reassign us and our new room was lovely. What we don't understand is why they would assign anyone a substandard room in the first place when other rooms were available. However, everyone at the hotel was very courteous to us throughout our stay.