Marit's apartment is very cosy and spacious. It looks exactly like the pictures and was very clean. It is close to public transportation for both the train and trams and was very convenient to downtown Amsterdam. Tram #14 was 3 ( very) short blocks away which took you into the Amsterdam core in minutes and the end stop was at Amsterdam Centraal Station.
We took the train from and to Schiphol airport which was very convenient to Marit's apartment. One note is you usually have to change trains but we found out that going via Amsterdam Centraal , if the connection shows arriving and departing from the same platform and within a few minutes, chances are it is the same train and you just have to stay on it! Thanks to fellow travellers, we found this out and did not have to lug our suitcases off and on the same train. Strangely, when we bought the tickets from a person at the ticket office , he did not know this as he said we would have to change trains.
Unfortunately, we did not get to meet Marit or Sander but our communication was very good.
We enjoyed our stay and would recommend this apartment to everyone.