Everything was very nice at Hetty's : we had a warm welcome, the room was indeed large, Hetty had even put a a fridge, coffee machine and something to have a breakfast in our room, which was very thoughtful. The location is well connected to the Amsterdam Centrum, (2 tram lines, so within 25 minuts you are at the Centraal Station, plus you can reach Museumplein in a 15 minuts walk). There is a grocery nearby, and all sorts of shops.
Our host was very kind and helpful, anytime we needed an information, Hetty knew what to say. Besides, our interest fields are quite close, so we had a very nice talk, and a very nice evening. We hope that she will soon visit us in Paris !