My colleagues and I stayed for 4 nights at Wouter's place for attending a conference in the RAI centre.
We did not meet Wouter but his friend Bob Who was very friendly and kind to let us check-in quite late (around 23 pm). Starting from the positive things: position was perfect for reaching the RAI by foot and around 3 km far from the city centre. The house is nice and cozy with a beautiful garden and we appreciated the quite of the neighborhood.
Negative things: we rent the room for 4 people but the extra single bed is Just a mattress on the floor, and then, that Room is really Small for 4, we could not move. Other thing, It was dusty. But Overall, we do not regret the choice due to the good position.