The sanctuary cabin at Volcano Rainforest Retreat was incredible. It definitely did feel like you were staying in a private little nook of the rainforest, but with daily housekeeping service and replenishing of the continental breakfast basket with tasty treats. We absolutely loved it, and would be happy to return. Five stars well earned.
Having said that, just some notes we wish we'd considered: nights get down to 50ish degrees at this altitude, so the outdoor shower wasn't ideal if adventuring from pre-sunrise to post-sunset like we were most days. The water didn't get hot enough & good enough pressure to override the air temp. Certainly not a negative warranting a lower star, but it was something that did impact our stay.
I think the only other noteworthy thing is SLIGHT line of sight from both shower & cabin to other cabins on the property; if you're looking to be TRULY remote and private, you will be slightly disappointed-we did feel compelled to close curtains of both at night.