Definitely try the "swing"! And ask for David.
This group allows guests to climb higher in the trees than any other zipline company in Kawai, which is why I picked it! The tour guides were patient and careful with climbers of all experiences, too.
Though the treetop tour claims 7 ziplines, one really just goes about 20 feet to another platform. Only 6 decent o es remain. So much time is wasted at that one setting up everyone. Otherwise fun.
The meeting point is right off 50, just west of mile marker 4 (half mile west of the humane society or 2.5 miles west of the community college)