This is a lovely little space if one or two people are just staying for a few days. The location and views are spectacular. We used the space as a hub to visit all over the island!
I would not recommend this space to any heavier / larger bodies folks. The bed is pretty small, with tight margins under the slanted ceilings in the loft. All the dining chairs have arms that bigger hips won't fit, so the futon is the only real sitting space. The outdoor furniture is all plastic, so again, not recommended for heavier travelers.
I wouldn't say that the futon is suitable for sleeping. It is short and hard with a bar in the center.
If you stay here you absolutely must go to Volcano State Park, it is spectacular and only minutes down the road! There's also some really great food in the area very close by.