Had an awesome experience with North Shore Ziplines!
There were certainly some white knuckle moments, climbing rope ladders and the like, but safety was a priority, so you never felt unsafe. The course was graduated, so each line was more challenging than the next, and that last line was brilliant!
The guides on the tour really made the tour. They were friendly and funny, clearly enjoyed what they did, and they were especially great with the younger kids - encouraging, patient, really great guys!
I can't recommend these guys enough!