Heather's place near the coast was a beautiful and secluded place to stay. For how remote and off-the-grid it was, it was remarkably comfortable - a cool breeze at night made air conditioning unnecessary (at least in the winter when we stayed), and the rest of the interior was super comfortable. I was apprehensive about bugs or critters inside, given its location in the rainforest and the more open architecture of the building, but we only ever saw one - a stray lizard, who presumably was helping keep the place bug free :)
The main downside I can think of is how far away it is from other parts of the island - but there is a nice village nearby, as well as some amazing black sand beaches, and the volcanoes and Hilo aren't too far. Because of the location, it's also less crowded than other parts of the island - we had the beach almost to ourselves when we went one afternoon.
Don't bring a lot of electronics, as the power system isn't well equipped for that - this cabin is more for those who want to unplug and unwind.