Hi
I did this tour in May 2016.
I can certainly confirm that we did see orangutans in the wild. We also saw loads of monkeys especially the proboscis monkeys (those with long noses) which are endemic to Borneo.
We were also very lucky because we saw the pygmy elephants twice, once when they crossed the river right in front of us.
However, sightings of any wildlife cannot be guaranteed.
Kind Regards
Di