I stayed at Nadia's for 3 nights in April and was very satisfied. Nadia was a great host: very nice, friendly and helpful. The room, bathroom and kitchen are very clean. The room is on the third floor, which gave me the privacy I highly appreciated.
I also like the location very much. Nadia's house is about 10 min walk from the train station Sloterdijk. From there, it is only a short train ride to Schiphol airport, Amsterdam Central Station, Haarlem or Zaanse Schans.