From the airport
By train: From Schiphol Airport, take the Sprinter Lighttrain toward Amsterdam RAI, Almere Oostvaarders or Hilversum. You will arrive at the the RAI train station in 10-14 minutes. From the RAI train station, take bus 62 toward Station Lelylaan and get off at the Kastelenstraat stop. Bus 62 will stop in front of the hotel.
Taxi: It's a 15 minute trip and is around 40€.