Absolutely recommending this. We went for 3 days river cruise and saw many species of monkeys, crocodiles, birds and orang utan!
We paid extra rm100 for elephant search and managed to see about 6-7 pygmy elephants. It was the highlight of the trip for us. At night time we went for night trekking and saw big eyes monkey, spiders and birds. It was rainy season and the lodge offered boots for rent (as we didnt bring ours).
The accomodation provided was nice. Private room with 2 single beds and your own bathroom. Make sure you bring lots of mosquito repellant as the jungle mosquitoes can be nasty. The food was good and you can refill your drinking water for free.
The place doesnt have any 3G/4G for Maxis user, so be prepared for internet detox (wifi is not available as well).