Four of us stayed for a 3D/2N package in late June and had a truly amazing time.
From meeting Hymeir and his team at the jetty, the whole experience felt like an adventure. The four of us plus three staff were 'it' and it felt like our own expedition into the rainforest.
Hymeir was in a excellent host full of knowledge about the surroundings - but humble enough to say 'I don't know' or 'we don't know yet' to many questions, hinting at the mystery and wonder still surrounding the forests of this region. His emphasis on the 'light footprint' of the lodge was also encouraging when so often natural places are ruined by a human presence.
We thoroughly enjoyed the hike to the caves which were breathtakingly beautiful. Also the hotsprings and evening wildlife boat trips were a highlight.
The facilities are basic but again, essential to keep the 'light footprint' however don't expect to get much sleep if you struggle in hot climates without a fan or aircon!
As the other reviews mention, this is a wildlife trip with no other 'attractions' but it is a very authentic and wonderful experience. We didn't get to see any elephants but it was exciting enough to see their fresh footprints near the lodge every day and know that we were right in the middle of their stomping grounds.
Other highlights were abundant sightings of amazing hornbills (several different species), majestic eagles, several families of wild boar, otters, monkeys, king fishers, a huge array of fascinating insects, oh, and leeches (which are really nothing to worry about, their bites being painless and much less irritating than mosquito bites, but you'll want leech socks if only to avoid the inconvenience of bleeding all the time!)