We stayed here for two nights and we loved it! The unit has lots of character from the steep stone stairs to the door; the unique door lock; the narrow stair case; the artist deco; lighting, and the very charming garden. I would say it's an old European house fitted with modern facilities. We particularly enjoyed the powerful and responsive shower/tub =).
Like all good hosts, Harald and Edith kept in touch often before and during our stay, helped us with itineraries and they were simply fun and friendly to chat with. Barring terrible weather, one could walk from their place to the Dam and De Wallen (red light district), on an easy stroll that hits many of the major sights in the city.
Highly recommended, especially for a couple.