I have slept more times in the Yotel inside Schiphol than I would want to admit. It's very very quiet.
You really can't beat an inside-an-airport hotel in terms of time to shower and bed after a zombie like shuffle off a transoceanic flight. It's bliss. And at Schiphol you are already inside security (!) so you don't need to guess the right time to leave your hotel. Not even the Gatwick or Heathrow Yotels are airside, nonetheless they are quite awesome especially the Gatwick one, the Heathrow one is in a far away terminal I somehow never land or leave from (uh, can you tell I have been to both... once or twice ;) ?). There should be more capsule hotels airside, really.
Edit: oh, Yotel agrees and they are expanding! After too long, now there's one at Paris Charles De Gaulle (CDG) airport -- and it's airside, too although more restricted than the one at Schiphol due to the way the airport is laid out.