We stayed this August, with our 2 kids, a couple of days here.
The house has a clean architecture. The flat itself is spacious, with a nice interior including the furniture. The kitchen is fully equipped. The 3 bedrooms are sufficient large and beds are very comfortable. The terrace has a nice view to the Alps and is great for eating outside.
The village of Klaus is the perfect spot for daily trips to Switzerland, Germany, Liechtenstein and Lake Constance and surroundings. Supermarkets, some restaurants and bakeries can be found close by.
The contact with Stefan, the owner, was very friendly.
We recommend this place without any restrictions.