Coffeeshop Reefer is located in Sint Antoniesbreestraat right near the world famous (Rembrandthuis) Rembrant House. The Red Light District is close by and the Nieuwmarkt is only a few minutes away by foot. This place is easily noticable by the bright signs outside especially at night.
Inside the coffeeshop it kind of feels like a small pub with the wooden bar area, tables and stools. The service area is at the back where you can check out the menu and purchase drinks and snacks.
The main sitting area is upstairs in the smoking room, I would avoid this one if you do not like tobacco smoke. Unless you are lucky enough to be in there when it is empty.
The menu is usually not that extensive here but they have updated it recently and there is a lot more availability. A nice choice of weed, hash and some co2 extracts sometimes available.