The place is excellent, especially if you are interested in the volcano park! But take care to have a rental car, the island is much bigger (of course that's why it's called Big Island ;)) than the other Hawaiian Islands and you have to drive.
The house is very clean, it's cool to stay at the balcony in the evening and everything else about it is also pretty cool! Some extremely cool geckos will check you out in a cute way!
The hosts are very kind and will help you with nearly every problem your facing and they will have some tipps planing your trip in prior. Even if Grace & Rafal are not there, the housekeeper (Kevin) is awesome too. He helps you out wherever he cans and gives you awesome Tipps too.
We highly recommend the place!