The cruise on the Mississippi River on a paddle wheel style boat has been a 50 year dream for me. If you want lots of activities on board, people running around and lots of noise you will not not find it here.
If you want some privacy, quiet surroundings, great views, great staff, excellent food and interesting tours, then the America and her sister ships are just what you are looking for.
I should add, we are in our early 70's, enjoy peace and quiet and some activity.
Our cabin was 150 sq/ft, choice of comfortable 2-twins or queen bed, with a private balcony. The bathroom was of good size and there was plenty of hot water. The cabins were cleaned and resupplied daily. The private balcony is where I spent plenty of time watching the sights along the riverside. A glass of wine in the afternoon watching the river go by, perfect!