The stay was very cool and pleasant, the evening activities was really amazing. Good breakfast options. The room was also good with good views of the Dehradun valley. Very nice and huge property. The staff was very co-operative specilly Himani Hemant activity zone is also very nice.
(Check out beautiful photos and interesting information about Sterling Mussoorie by Sterling here. https://www.sterlingholidays.com/resorts-hotels/mussoorie)