This holiday certainly provided many amazing, once in a lifetime experiences, but I have to take issue with the difficulty grading in the brochure. In 2013 we did the Canadian Rockies walking holiday which was graded challenging. Trails of Borneo is graded moderately challenging suggesting it's easier. Yes, there were less treks involved but all other aspects of the trip were significantly more challenging. The heat, humidity, food and internal travel were pretty uncomfortable on occasions, and around 1/4 of the small group of 8 became unwell at different times. In my case it was heat exhaustion from hiking the headhunters trail and then sitting in an open long boat for 3+ hours in hot sun. The overall environment was way more alien to me than Canada, but it was my first trip to the Far East.
Having said all that, the scenery and wildlife (both large and small) were fantastic, from giant insects to pygmy elephants, orang-utan, proboscis monkeys, snakes, bats, crocodiles and birds. The other group members, guides and support staff were also very good.
The itinerary at times, particularly the travel arrangements, felt like they needed some fine tuning. Before we went, I read one review criticising the amount of internal flights. Well thanks a bunch! Exodus obviously took heed and threw in a day of cramped ferry travel instead, which was very unpleasant when suffering from heat exhaustion. Cheap internal flights would have been much better.
There also seemed to be a lot of 'optional' side trips, which cost extra, which everyone did. Why not just include them in the main itinerary?