Coffeeshop Voyagers is located on Geldersekade in the city centre very close the red light district and just across from Centraal Station. This place is regarded by many as one of the best in Amsterdam. These guys also have a hotel upstairs which is always nice for a perfect wake and bake.
The coffeeshop itself is quite small which is now divided into sections to allow for a smoking room for tobacco use. There are not many seats in here and it gets quite busy but always worth stopping by and checking out the menu.
The menu isnt the biggest but they make up for the lack of quantity with quality. Deals are also available for larger purchases. These guys only tend to stock 1 or 2 types of hash but again this is usually also top quality.