The views are really stunning, and I prefer it there, overlooking the trees/rocks/ocean from the top of the Kysna head, as well as the flat stretch on the return, with the beautiful water, compared to the view from the town/harbor area.
The ferry ride, drive up the hill, and the walk down were all beautiful and kept the experience interesting, and the guides do tell you some interesting information along the way. The walk down is not difficult, and there is an "optional" further walk down to the cave, which should be fine for most people.
The buffet was standard, and actually didn't meet my expectation in terms of food variety, but the taste was good -- drinks not included. Also, it can get pretty windy/chilly in the table area, since it's shaded.