I first tried to book with cheaptickets.com but there were no seats available to go back to schipol. So I had to look for other opportunities. Well, I had to fly via London with a different airline than that I came to the states with but thats ok. Payment and booking handling was very quick.
Used it when I came to the States to do my internship. Good service and cheap prices for Dutch conditions. Flights from Schipol to JFK were good at price and availability.
Good site if you got a simple question... but all in all my opinion is that you can't get answers to real complex questions. If you ask you only get stupid or $#*!ty answers.