The apartment was really beautiful, just like the pictures. The room and living room available have a very nice light and were really spacious. The location is also the best, there's a tram station just in front of the apartment or metro is available in 5 minutes (4 stops to Central Station) even if we didn't use them as much, as we like to walk a lot and the apartment was 10 to 15 min from the center.
In the end, we had a great stay in Amsterdam partly thanks to the awesome place Freek makes available to guests. If I had to come back, i'll sure be coming back to his place !