Swissotel is very centrally located so expect the noise of a busy city centre when the windows are open. We had no trouble sleeping though, once the windows were closed and the aircon was gently humming away we both went straight off to sleep. The rooms are medium sized and the bathrooms are pretty small but clean and functional. Free WiFi for guests and a turn-down service in the evening were nice touches. The staff were friendly and helpful and there's a left-luggage facility if you need to store your bags before or after your stay. It's a 10 minute walk to the central train station and all that Amsterdam has to offer is walking distance away.