I stayed with my daughter at Grethas place for nearly one week in August.
We enjoyed our stay very much, altough the weather wasn`t so fine for that time of the year. Steigereiland is very near to the centre of Amsterdam ( 5 minutes walk to the tram Station). It takes about ten or fifteen minutes to Central Station by tram.
It was perfect for us after a busy day in the City to travel to the quiet and calm place in the middle of nature, surrounded by water.
The flat itself is on the last floor, a very big and bright room with windows on both sides of the room, and with a nice balcony. We felt at home there, with the white and wooden furniture. Everything we needed for the stay was there. There even was food for breakfast for the next day, because we arrived late.
Gretha was an open-hearted host and she gave us useful Information about the City and about places to go.
I can highly recommend this nice place for staying in Amsterdam.
I would definitely do it again.