My daughter and I stayed at the beautiful Wharf House apartment and I have to say that I will not stay anywhere else when I return to Amsterdam.
The apartment is even nicer than the photos show and was spotlessly clean. The rooms are large and bright and the little kitchen in a cupboard was more than adequate. There is a two burner stove, a microwave, fridge, sink, ample dishes and small conveniences, like salt and pepper and tea and coffee, that make a huge difference when you are travelling.
If you have concerns about not being in the "heart" of Amsterdam, you should ignore them and stay here. The location is perfect. We appreciated coming back here at the end of the day and being far away from the noise and tourists. The canal behind the apartment is very quiet, unlike the canals in the centre of the city. Sitting on the dock with a glass of wine you would think you are miles away from the city but you aren't. We walked to the Jordaan, the Anne Frank House, the Noordermarkt and a number of other sites and restaurants with no problem. The tram and bus stops were only a short walk and took us anywhere we wanted to go. There are excellent restaurants nearby as well.
Wooter and Liesbeth are wonderful hosts with excellent advice on sites and restaurants. They are happy to make reservations for you and provided maps and lots of information on the city. Do take the boat tour with Wooter it is much better than the commercial tours. They have three other properties on the Island and I got a chance to see one of them. It was spectacular and I'm sure the other two are as well.
A beautiful location, an excellent apartment and friendly hosts made for a perfect trip.