We stayed for a week in his flat, most things were fine and tidy, Rik was obviously a culture guy as you can find huge sum of his audio, movie, book collection in his house .Decoration of the house was nice as well ,and the cat was cute and lovely.
the cleanliness can be improved a little bit, it was not a major issue, the house was generally cool and tidy, but it would be perfect if this is improved
Rik himself was also a nice and decent guy. And he speaks good english.
Amsterdam is not a very big city, this flat was not far from city center, but you still have to walk a bit before you can reach the bus stop, ride a bike will be much faster.