I organised a trip for my sister's hen do with 13 people participating in the activity. We ended up spending 3 hours on site and noone tried to hurry us up.
The staff, especially Si, went over and above what anyone could have expected. The activity itself was brilliant, very good value for money - I would of expected to pay twice the amount for what was included.
2 opportunities for improvement (although these didn't reduce the quality experience) would be having a litte shelter with a vending machine(s) for spectators and creating a second zip line across the lake to redue the bottleneck at that point in the day.
I will definitely be going back and so will most of the group. Brilliant!