Went to Magic Kingdom. Bus was comfortable. Driver ensured we knew how to find the bus at the end of the day. Admission was the one park only card. Transportation Center (where the bus drops off and picks up) is at the Monorail and water taxi stop. We took the water taxi to the Magic Kingdom and the Monorail back.
There is plenty of time to see a great deal of the park and go on the rides, see exhibits, etc. We saw the parade down Main St. and made it back to the bus in plenty of time. Also had time to shop a little before the parade. Would do this excursion again.
Ship ports short walking distance from the historic section of town and the shopping. The visitor's center has a map for a self guided walking tour or you can pay $10/person for a walking tour with a guide. You can also take a water taxi over to Paradise Island.
Did not take an excursion this time. Took a cab to the shopping area. It is a long cab ride to the shopping area. It was nice to walk around. We didn't buy anything this trip (we have in the past). Ship leaves at 1:30 so there is not much time in the port.