Just like all these other reviews say, you should not hesitate, and book Peter's castle immediately if you are lucky enough to see it available for your dates.
I've been to many AirBnBs and this was the most unforgettable, unique one by far. Peter was extremely nice, and even drove us into town to pick up some dinner and drinks. Everything is set up for you in the castle, and it makes for a stress-free experience.
I hope I am fortunate enough to stay here again in the future. Thanks again Peter!