Our stay here was great, communication was prompt and helpful (thanks, Reuven:), apartment was clean and comfortable, location worked for us (10 minutes walk to Willesden Green Jubilee line). We stayed as a family, would come back again.
A folder on the table contains everything you need to know -- but only in English, so it can be complicated for those not speaking the language. It is good to know that the house has more airbnb apartments, similar ones, so for us based on the pics it was not entirely clear what to expect exactly. Noise might be an issue for light sleepers depending on actual neighbours & guests, as the building is quite old and not soundproof: thuds, creaks, footsteps, children, conversations and music can be clearly heard through walls and ceilings. (The info folder actually says so, asking guests to keep noise to a minimum.) Stairs might be an issue for some (we had a few in the flat itself, too), they were fine by us.
Overall, it was a pleasant stay, good value for money, thanks:)