We were for 3d2n in Danum Valley and predominantly for animal watching. We liked how knowledgeable the guides were and how beautiful the scenery was overall. Also, we got lucky with spotting an Orang Utan on the very last morning hike.
However, for the price we paid, we think that the dorms could be less rundown. Also, we sometimes had the feeling that the guides were rushing a bit and missing out on chances for spotting animals.