We found Hawai'i, and especially Volcano, very expensive and it didn't live up to expectations so therefor it's kind of hard to write a review. However, when we don't think about the price the Rainforest Retrait is a nice place to stay.
We stayed in the Sanctuary Cottage. It's different, nice, but not at it best yet. The idea is great. It's an wooden cottage with lots of windows and in primary forest. The room, not very big, is full with things. However it's too full, so there wasn't room for the bags. We had to remember jumping over them at night in the dark, when going to the bathroom. It would be better if the'd loose the to chairs (higher than table) and one of the side tables. As crowded as the room was, we missed a chair at the terrace, there's only one.
Hygienic logistic needs a bit of creativity. One would expect water in the bathroom, but there isn't. There's just a toilet and a cupboard for your thing. Brushing your theeth can be done at the kitchen unit in the room, shaving is hard as there is no mirror. The shower is outside. You can let a curtain down for some privacy, there are other cabins hidden in the forrest, but our curious neighbour could still see us. We didn't care about him, hope he had a nice time spying, but I can imagine not everybody liking this. There's also a hot tub outside, it's very hot so you can only stay for a short time but it's nice, we enjoyed it during rain and that was nice.
During day the cottage is cleaned but not every day (at least during our stay), but they do change the food every day. You can choise some things for breakfast and they'll provid them for you, which is nice.
Further the cabin is complete with flashlights, candles, wifi, tc (didn't use) and all kind of 'zen-things' (didn't use either).
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC