This place is truly amazing. I thought it would be more desolate, but it is almost like a whole community of houses living on the lava fields. This place is walking distance to the ocean and lava field cliffs. We had cloud cover for both of the nights we stayed so we didn't get to see stars, but the area definitely has low light pollution!
Wifi is strong within the house, and the TV was nice! I recommend having 4 wheel drive as you will be driving 10 minutes on unpaved roads.
The outdoor bathroom is right on the back porch, and the shower has the full temp range from cold to hot, so I was able to take a warm shower.
Best of all, Sonja was great and even texted us in the AM on the Saturday we stayed to tell us about a farmer's market we could go to. She also has the biggest guest book that I've seen in an Airbnb, complete with a menu of the breakfast place she recommends and the history of the lava flows.
If you get a chance to book this place, do it! It is such a unique experience.