Just back from a weekend break in Amsterdam. The apartment is fabulous, spotlessly clean and in a lovely location. There were 3 of us and we had plenty of room. The beds are very comfortable. There is no kitchen but there are tea/coffee making facilities. There was shampoo/conditioner/shower gel and also some fruit and chocolate, which was a lovely touch. The area is really safe and there are lovely little shops and restaurants nearby.
The trams are close and so easy to get around. I would recommend getting a day travel card (€8). Train from the airport to central station is very quick and cheap, and only 3 stops to apartment from central. If you want to get taxi, make sure you book beforehand as it is really expensive if you don't(€75).
Anneke and Gerald are great hosts, can't do enough for you. I would thoroughly recommend their place, I will definately be back. Thanks for a fabulous stay.
P.S Elvis the cat is gorgeous!