We purchased the 3 day bus tour, and ultimately only used it on 2 days, but we enjoyed the Riverwalk boat tour and going up in the Tower, and the bus was a great way to see the city. The first day, we stayed on the bus for the whole loop just to see what there was, and then we continued on the bus to a few stops that first day, and then saw the remainder of the stops we were interested in the second day.