Nadine said... Bookme doesn't sync directly with their calendar so we showed up and had no reservation despite paying for a booking. They were accommodating and found us a new spot for later in the day but it was disruptive to our plans. Book directly on their site for the most up to date availability.
As for the zip lines - they're incredible! Our kids (10, 13) loved them as well. The guides were great.
Of note - there is some light walking and carrying of the trolley.