Fantastic location makes this a stand-out, we found ourselves less than a 10 minute walk from most things. We'd pick a restaurant and find ourselves just 3 mins away. The Anne Frank House was about 7 minutes away. The Rijksmuseum was slightly farther but still only 25 mins to walk. Pien and Zisis were very attentive and always replied within minutes.
The flat looks exactly like the photographs, but, being December, we found it cold. A slightly thicker duvet cover would have been nice. There is a heater/radiator in the room which we had to use liberally some nights. Again, it is winter. The stairs were certainly steep but nothing unbearable of course and we got used to them and found them quite charming. The building is old but very modern inside. All in all an amazing stay, just a little cold!