In addition to the previously mentioned positives such as location, view, breakfast, and staff, I would add:
*beautiful marble bathroom with strong water pressure and plentiful towels.
*good lighting for reading in bed.
*ample storage for clothing and suitcases.
*reasonably priced soft drinks and water in mini-bar.
*good air-conditioning and ceiling fan for comfortable sleeping.
*generous drinks (with snacks) at the bar.
All in all, Forte is delightful and the Negresco a solid choice for a happy, comfortable vacation.