My 3 daughters and one friend of theirs stayed at Sander's house in Amsterdam. Although we did not have the opportunity to meet Sander his instructions and communications were great. He was very accommodating to allow us to drop off luggage before the house was ready and was available to answer questions for us during our stay. Very good communications. The house worked out well for us.
Two girls stayed in the bedroom on the 4th floor, and 2 stayed in the front bedroom on the 3rd floor and I stayed in the back bedroom on the 3rd floor. We really felt like we had the experience of staying in a dutch house and got used to the steep stairs very quickly. The house was clean and had everything we needed. Bathrooms were very good also and the shower and jacuzzi were welcome! The central location was amazing. Easy ride from the airport on the bus and nothing was more than a 15 or 20 minute walk max. We didn't need to use the tram at all! There are some clubs just down the street, and a busy square but we were so tired at the end of the day that whatever noise there was didn't bother us. There is also a little convenience store right next door! I would definitely stay there again when visiting Amsterdam!