This was a really awesome experience and pretty much exactly what my wife and I were hoping for. She has always dreamed of living in a treehouse, so that's why we chose to stay here for a couple nights during our honeymoon on the Big Island.
It's a special feeling to be in that secluded part of the jungle. To be honest, I thought it would feel maybe slightly more secluded, as you could still hear some traffic in the distance and the treehouse is at the end of a road with several other houses. But it still feels quite secluded and special. The houses are far enough apart with plenty of jungle in between so that you can't see anyone else from the location, and we didn't hear anyone else, save all the critters in the jungle and the faint traffic in the distance as I mentioned above.
It feels pretty adventurous (in a good way!) climbing up the ladder and pushing up open the heavy door to get up into the treehouse. Once we were up there we were surprised by how amazingly taken care of we were! The house is really clean and interesting and well maintained, with lots of little goodies lying around that are fun to explore. We were sooo hungry when we got there and were really grateful that Kristie left us roasted macademia nuts, 2 brownies and a plentiful supply of bottled water!
The house is totally off grid, so if you've been interested in that but never had the chance to experience, it's really fun to explore a house that operates that way and all the appliances.
If you rent a car (as you very likely should if you're visiting the Big Island - we did and we almost always void being in cars if you can), then the location is a good jumping off point for getting to Volcanoes National Park and exploring Hilo and the whole east side of the island. Note that the road that the house is on is pretty rough so we were happy we had an SUV rather than a regular car. This is true with many parts of the big island.
We really enjoyed our stay at this treehouse. Kristie and her people at Guesty were very hospitable and wrote us very nice, clear messages. Staying here was a very positive and memorable part of our honeymoon trip.