My wife and I spent a couple days in the treehouse bungalow for our honeymoon, and it was fantastic. The sounds at night are amazing, you can see the stars so clearly, and there is so much to do within 15 minutes.
My only regret is that we didnt read through the guest book when we first arrived. My one big tip would be to read through some of the entries in the guest book. There is A LOT of great advice in there.
If we come back to Oahu, we will definitely want to stay here again. Maybe this time we will actually put together a bucket list from the guest book.