In 6 days, it managed to tour all the essentials of New York, Philadelphia, DC, Boston and Niagara Falls, with fairly deep coverage of Niagara Falls. At a price that is more than reasonable, except those optional tours. It would be better if left enough time for breakfast each day.
I have sent my family to the trip. They were very satisfied and happy to see east coast. The tour guider and driver are very helpful, kind and knowledgeable. Overall, this an excellent trip.