My friend and I had a great great time at Judith's and Matthij's apartment. The room is spacious, minimalistic and tasteful decorated and has everything you need to feel comfortable - even an awesome swing! It is turned to the backyard, therfore a nice quiet place. And when you go out, you are already at the Haarlemmerdijk and in the center of action.
The two were great hosts - they welcomed us warmly, were friendly, attentive, helped us immediately when we had questions, had good tips to get to know Amsterdam and were just lovely.
I would recommend it anytime and would always come back again.