Our family had never done a zipline course before, but this was a ton of fun! When we were done, we all said that we would have regretted not trying this out and that included my wife and I and our sons (ages 10 and 13). The guides were cool and didn't take themselves very seriously, but they took their jobs, our experience, and the safety of everyone very serious.
We had Anya, Kevin, and Monica as our guides. Make sure to tip them when you are done! At the end, you feel like they were your camp counselors for the day.
One thing to note- our youngest son was just over 60 pounds and the guides did everything possible to make sure he didn't stall and made it down every line without getting stalled. This even included them hanging on the end of the Superman line and it worked! We appreciated the extra effort there.
I seriously can't stress enough, how fun this experience was. Definitely worth every penny! You will regret heading home from Kauai not going on this course.