We booked this tour after reading the glowing reports on Trip Advisor, and on the whole, it didn't disappoint. Briant gave a bit of the Panama Canal history as we drove to Gamboa (more info would have been appreciated), and the boat trip itself was wonderful. Lots of sightings of capuchin monkeys, and close enough to afford great photos. (Some monkeys seem to be fed by tour operators so are basically trained to approach at the sound of a boat.) Great sightings of snail kites as well. The walk through the rainforest was lovely, though a bit rushed. My husband spotted a brown frog, which Briant then caught for closer viewing (he's a frog expert), but that was it for wildlife — except for the ubiquitous and always fascinating leaf-cutter ants. One point I should mention. The walk involved crossing a couple of fast-flowing streams over slippery rocks. A bit tricky for some, and Briant was very good at helping the first couple of people across. (We were a group of 6.) My husband and I were at the end, however, and although we didn't need assistance, we were annoyed that Briant led the group onward (with accompanying guide-talk) before we'd even reached the other side! The walk seemed rushed, possibly because we'd had a late start that morning and Briant needed to be back for another tour. Apart from that, the 3.5 hour tour was good value.