The treetop challenge is amazing. Be aware that when you book with Klook and you choose a date and time that you are NOT booked in with the treetop challenge. Their systems are NOT connected. You still need to call the Treetop challenge people and reserve your timeslot. Be aware that the time you booked over Klook might be full and not available anymore. But the Challenge was amazing and the staff from the Treetop Challenge very helpful and friendly.