Close too the airport with frequent shuttle services. The staff is friendly and rooms are well equipped. If you have to stay close to the airport this is "the hotel" for you.
However if your intention is to see the Amsterdam downtown i would not recommend it. 10 mins shuttle ride to the airport. and then the train (one way 7 euros) to downtown for 15 mins,say it is roughly half an hour ride to the downtown. It is quite a long time for a city that can be walked all over in half a day. Besides, you will always feel the pressure of catching the last train (and the shuttle) if you are going out for the night