Flat no.1 will be suitable for 4 persons (there will also be enough space for a travel cot).
It will offer you a nice living- and dining area, a bedroom for the parents and a bedroom for two children (the couch can also be used as an additional bed).
The bathroom is equipped with a shower and a bathtub. Of course there's a seperate toilet.
The balcony offers a beautiful view to the lake and the mountains.