I stayed at their place for about 2 months and half, and Stef and Angela were like a family. If you want to stay in Amsterdam, I highly recommend their place, since they are REALLY nice and kind, ready to help and welcoming. For whatever question about the city or need you may have, they will help you.
The room is big and clean, with an amazing balcony (there is a mattress where you can lay down)! The neighbourhood is safe in a beautiful green area!