Only one negative point: wi-fi only in the hall, not in the rooms. The rest is OK. Good cost-benefit for backpackers.
The house it's actually very good and clean, but its far away from downtown and in a muslim neighborhood. There are buses allnight (takes 1h from city centre) and a subway station 10 blocks away.
It's a nice appartment, and the hostess is very friendly. Good cost-benefit. The negative side of my room (attic) was the bathroom, which was two floors downstair, in the appartment. During the night there are buses from city centre to the neighborhood, but it doesn't stop in front of the B&B, you have to pay attention to get out of the bus in the correct stop and walk a little bit then (it's quite a hardship when you've seen Amsterdam in 'all it's dimensions'). Good privacy, mainly for couples.