I would recommend this activity for a group of people who have fun hanging out regardless of what they are doing. I also think it would be a lot of fun for older kids - a great family activity.
I did it with just my husband and we probably wouldn’t do it again because so much time was spent waiting for the rest of the group (people we didn’t know). Like 10 minutes or so between each ride of just standing there waiting in line in the sun (we didn’t expect to get sunburned in the woods, but it was early spring and the leaves weren’t filled out on the trees yet).
We were in the woods for around 2 hours with only I think 7? or maybe 9? zipline runs, and for us all the waiting was tiring and overshadowed the actual ziplining, but I can imagine that if I had been there with a bunch of my friends or my nieces and nephews I would have had fun even while waiting for my turn.
I will say our guides were great and did their best to help everyone have fun with banter and music while we were waiting.