Isabelle and Mariusz were great host. They are easy to reach out.
The basement itself was 5 star, very nice, stylish and clean as you see on the pictures. Great place for sit back and relax by the lake.
The only thing was bothering me was their dog which was left alone during the day and barks incessantly. I was working on a project and needed to concentrate and the constant yapping upstairs on the mainfloor was irritating. Other than that everything else was great.