Staying at Joel's is a great way to explore Volcanoes National Park and the area around it. I was a little nervous since it's listed as a private room, and it is part of a larger house, the it has it's own entry and is separate. I heard people moving around in the other house a few times, but I actually didn't see anyone over the three days I was there.
The space is large enough for a couple people with a large comfortable bed, a cafe table for meals, microwave, fridge, etc. The shower is huge, with pretty good water pressure, the fridge came stocked with condiments, there were paper plates, paper towels, silverware, a can opener, and lots of other little things that really help when you're staying in a new place.
And the location is just as good as advertised. It took roughly 5 minutes to get from the driveway to the entrance to Volcanoes National Park, which is particularly great for things like night hikes to the lava and star watching. It was another 5-7 minutes past the park to get to the tiny town of Volcano and the few restaurants there. The neighborhood was quiet, and people I saw out walking waved when I drove past. I'll have no hesitation about staying here again next time I'm visiting Volcanoes.