Let's face it, Amsterdam is expensive. It's hard to get around. You would end up paying about the same as this wonderful place, perhaps a bit closer to Centraal, but it would be a tiny little room, with no facilities, and no character. The neighbourhood is beautiful - a planned community about ten years old and six KM away frmo thte downtown hustle and bustle. But despite Amsterdam being so close, Steigereiland is wonderfully natural and quiet and architecturally interesting place to hang out and use as a base to explore Amsterdam, Leiden, Holysloot and zaanse schans.
The house is exactly as advertised. You'll need to be a little athletic to get up the stairs to the unique loft bed, but surpisignly (to us) it works, and is comfortable. Shower is nice, fully kitchen works as advertised, and the basics (oil, sugar, coffee, spices) are provided.
In short a very nice place to stay. And the cost - our first and only concern, really - is explained quite simply: this is Amsterdam.