Let's get the steps out of the way first - you do need to be relatively fit but its not that bad. I have COPD and apart from having to rest a couple of times (to admire the view) it wouldn't put me off returning.
We did a 3N4D package which was perfect as we never felt rushed. The package included 3 afternoon river trips and a couple of hilltop walks. We opted to forego one of the walks for an early morning river trip (well worth it) and we squeezed in a visit to the Gomantong Caves (about 30-minutes from the resort). We saw lots of wildlife (heard lots more) on the river trips but taking photos of Orangutangs from the boat proved quite difficult. The highlight for us was seeing the Pygmy Elephants on our last afternoon. Our guide Rodel was a star!
I should also mention that the rooms were clean and spacious and food delicious and freshly prepared! As there are only 4 rooms, there is no menu to choose from (having informed them of your dietary requirements prior to arrival). Beer and wine is readily available and reasonably priced.
All our transfers were arranged with Gert and everything went according to plan.
Thank you Gert and team for a fantastic few days.

Three of us stayed here and it was great. The tour guide was amazing and found us an elephant. The Food is delicious. We saw an orangutan at the site with her baby. We were very happy that we stayed here instead of a large resort.

Probably not for everyone... the stairs are uneven and you may go up and down three or four times a day (to get onto the river to look for wildlife) BUT worth every step. You are immersed in the jungle.
Rooms are simple but comfortable. And because the Resort is on a ridge, mosquitos etc were not a problem.
Jason and the staff team were great. They bother to remember everyone's name and somehow manage to meet all dietary requirements (gluten free pancakes for example!)
We booked direct - easy to get email responses and useful information to prepare.