We booked the Green Discovery Treetop Explorer for three days. Driving out from Pakse, we headed up to the Bolaven Plateau, where we trekked into the forest, ziplining our way across the course of a series of deep waterfalls. The trek was stunningly beautiful, and the guides very helpful and friendly. Accommodation was in some gigantically high trees - two beds on a platform in the tree's canopy. (Access was by zipline!) Absolutely magnificent. The only small criticisms I have are these. Firstly, the tour is advertised enthusiastically as being easy, and something people of all levels of fitness can do. I am not very fit (but not very unfit either) - and it was very hard going at times. Second, the tour guides make lip service to safety : but they maintain a cracking pace through paths through the forest inundated with water and overrun with boulders and tree roots. One very fit person in our tour sprained his ankle, and it could have been worse. There was no medical aid kit available at base camp (and the guides didn't carry any) - miles away from medical help (and separated from it by ziplines and a via ferrata!) The tour isn't kitted out for the possibility of any injury.