Travel Department are charging €1100 for this 4 Night trip. If you book it yourself you can get flights for €503 with Aerlingus and the same hotel for €340. A saving of €257
5 days is plenty for NYC if you plan it well and only do what you really want to see and try to limit shopping to maybe just one day. Some things can be done at night and are even better when the city lights up (broadway shows, times square, top of the rock and so on)