My fiancee and I spent a week in Amsterdam and this apartment was part of why the trip worked out so well. The location ia great - walking distance to all places worth visiting, very close to the tram and main comercial and touristy areas, yet on a quiet street surrounded by quaint local stores and restaurants. The apartment is perfect for a couple, with ample room in the bedroom and living room. If you like to cook, the kitchen is well equipped and easy to work in, we enjoyed preparing a few dinners at home. The apartment also has a lovely rooftop terrace which we enjoyed on New Years Eve to watch the fireworks and I imagine would be quiet nice on summer evenings as well. The building is nice and quiet, but do note that the apartment is on the top floor and there are no elevators, so consider packing lightly if possible to avoid carrying too much luggage up 4 flights of stairs.
The apartment was very clean, modern, comfortable and spacious, and Jorg was a great host - it was easy to contact him and he was very welcoming even though we didnt get a chance to meet in person. Overall I would highly recommend staying in this apartment!