I stayed 13 nights during January (I also stayed there during my previous visit to NYC).
I can not imagine a better place: the hotel is gorgeous, the decoration is excellent and the bed is the best I have ever slept on.
I also love the upper east side location, but really the best of all is the staff: they are very professional and friendly and make you feel at home; the Director of Guest Relations send me an e-mail to ask the estimated arrival time to minimize waiting time (of course, my room was ready when I arrived!!!); the guest service agents are really very helpful and friendly.
No doubt during my next trip I will stay at The Surrey.