As we had a week in NYC, we decided to do the day trip to Washington. A very early 06:30 start meant we saw Time square pretty much empty.
the coach was comfortable and had free Wifi, so the journey didn't seem to take that long even though it was 4ish hours.
The tour basically gave a taster of Washington - stopping at the highlights. Arlington cemetery to see JFK's grave, the Vietnam, Korean war and Lincoln memorials, the white house and a meal stop near multiple museums but with only time to go into one, we chose the American Indian museum though many went to the national air and space museum.
If I did it again I would choose to have more time, particularly at the museums but for a day trip from NY, the tour gave a good overview.