Very nice apartment in a good location ~25 minutes from the city centre by bus. Easily accessible by train from the airport and there are good tram services as well.
Petra, the host, was extremely helpful and provided lots of books, brochures and guides to help newcomers find their way around Amsterdam. She even provided the chip cards which all of the public transport use. Borrowing them saved us €7.50 apiece and we could easily top them up at our leisure.
Cooking amenities are quite basic (microwave, mini fridge, toaster and kettle) so we normally had a small breakfast in the apartment only and ate lunch/dinner in cafés and restaurants. Those looking to visit Amsterdam on a budget should bear this in mind as it would be a pain even with the good public transport to return from the city to make lunch on the cheap and food/coffee in Amsterdam is reasonably expensive.
The double bed was very comfortable as was the couch. Shower/Bath facilities were excellent; we always had hot water for showers and and it was nice to find shower gel and multiple towels prepared for us as well.
There were no issues with the WiFi and there was also a television present and multiple DVDs (although we did not use either).
It is a 'middle' apartment meaning that other people are living both above and below. When people are coming and going in the hallways it can sound as though they are right in the apartment hallway beside you! However there were no issues whatsoever with noisy neighbours and other than some construction works which could be heard some mornings it was a very peaceful place to stay.
I would recommend the apartment to anybody looking for a good base from which to explore Amsterdam on a city break.