From the airport trains are leaving every 10 minutes to centraal station Amsterdam.
If we agreed that you go directly to Double Dutch,
than take any metro from centraal station and go out the first stop, this is called Nieuwmarkt.
There are several exits, be sure you take exit Nieuwmarkt. If you come out of the station, walk straight ahead and pass by the Oriental supermarket at your left side. Now turn left before the canal, this is Kloveniersburgwal. You will find Double Dutch at your left side on number 9 ( next to restaurant Gusto).
It is the right door with the "pull" bell.
A taxi from the airport will cost you 40 Euro and from Central station 7,50 Euro. (Don't pay more!!) we recommend you to use TCA taxi's.