Cozy, tidy, very quiet and stylish room, with a private shower and sink and a half-private WC just in front of the room. There is also a table and a chair, a big flat screen TV (I didn't use), and some useful tourist info material about Amsterdam. Pim was a very friendly and helpful host (Juan was not there). You can freely use the kitchen which is beautiful and fully equipped, but I used only the fridge.
The location is perfect: in the beautiful neighbourhood of Jordan, on a main road very close to tram stops to go in many directions, like to the central train station or to the museum district (or to Westergasfabriek, where I had to go for an event). Dam Square and the Old City Centre are easily reachable on foot.
Things to be aware of: 1) The flat is on the fourth floor with no elevator. That was of no concern to me, and Pim kindly helped me carrying my suitcase at my arrival, but if you don't like stairs that could be a problem. 2) The shower comes from the ceiling (so maybe you'll need a shower cap), and there is no door to separate it from the rest of the room (there will be some dampness in the room after you took a shower).
Altogether I am very happy with my stay, Pim & Juan's place was a great choice and I would stay there again should I come back to Amsterdam as a single traveler.