We stay there as a group of 5 guys. Marfi was very friendly and helpful. We had a early arrival (10.30am) and Marfi was very accommodating. It is an older apartment with high ceilings. The kitchen and an additional toilette is outside. But that is not a problem. Die beds are good. Some furnitures are old and the windows to the front can't be opened. Something should be renovated. But for us it was not a problem. In the front room is was not noisy. So sleeping was not a problem. The WLAN/Wifi/TV worked great. The apartment is nearby to the Vondelpark, Leidseplan and Museumplain and that is wonderfull. The best place to start.
Thanks for a great stay!