We stayed in over the new year and it was clean and spacious with a nice kitchenette and modern facilities. The best thing about this apartment was the location. It is just down the road from the concert hall and the museum, about a 5 minute walk. We wanted to be central but away from the hustle and bustle of the centre. This was a great base for sightseeing and about a 10 min walk from leidesplein. There are some really nice bars, bistro's, and restaurants on the door step and the centre is a short tram ride away. It is about 25 mins on bus from the airport, you get off at Museumplein.
all in all I would definitely stay here on a return trip to amsterdam