Thank you very much, everything was fine.
Its very close to the subway and you are in Manhattan in about 15 Minutes. At the end of the street there is a very good mexican restaurant. With a yellow cab from the airport (JFK) it costs about 50 Dollar to get to Hooper street. From Hooper Street to the airport we called the number Valerie was suggesting and the price was only 35 Dollars.
The apartment is perfect for 2 persons. The sleeping couch for additional persons is only comfortable for short terms. We spent 5 nights there and it was okay. Everything is clean. (Sorry for leaving the empty bottles in the apartment...)