Overall, I thought this was a great tour. My boyfriend and I went with his parents, who are not particularly adventurous and were VERY hesitant about the whole thing. Our guides did a great job of explaining how we were staying safe, making everyone feel comfortable, and made sure everyone had a good time.
With that being said, if you are a seasoned zipliner, or a climber (like me) it wasn't the most exhilarating excursion I have been on. Either way, we had a great time and a great experience.
The tour ran two hours which was nice, it didn't eat up our whole day. If you are driving from the west side of maui, give yourself a little over an hour to get there, and be sure to arrive early!