Cruised from Providence, RI (actually ended up leaving from Fall River, MA due to a port change). Traveled with my father, who is 78 and in good health. I'm 51. I was the second youngest person on the cruise. There were no children on this cruise - but there's no pool on the ship, so if I were a kid, I'd choose Disney. ; ) American does a great job of providing transportation to and from the ship and coordinating it all for you. Our room was ready when we arrived on the ship. Disembarkation was a piece of cake. No long lines. Probably a bonus of sailing on a small ship. We had 82 passengers on board.
This cruise line is moderately expensive, but the room sizes (especially the bathrooms) are quite large for a ship. The food is AMAZING and the staff couldn't be nicer. Shore excursions cost extra - but after your second cruise with American, they are included. We ended up doing shore excursions on our own - usually visiting the same places as the organized cruise excursions - and it was no problem to find our own transportation (the public bus systems on Martha's Vineyard and in Newport are very easy to use). Several times we were docked close enough to walk (less than a mile).
The pace of this cruise is leisurely. It was the perfect amount of things to do and down time. I would totally recommend it.
Our cabin had two twin beds, LOTS of drawers, and a nice sized closet for hanging items. There were definitely more drawers available than two people needed for a week. The room itself is a nice size. The bathroom is quite large - like that in a small apartment - with a "normal" size shower.
Our room had a balcony and if I travel with American again wont' upgrade to a balcony. The balcony is very narrow - you need to sit sideways in a chair. And the window in the room is quite large - which it is in the cabins without balconies - so there really is no need for a balcony room. Plus, there is a ton of room with really comfortable (and some shaded) patio furniture on the top deck.