Christiaan's place is excellent, as noted in many of the other reviews. It's an amazing location, a giant space, and Christiaan is a great host. Others have covered it, but be aware that it's up 4 flights of stairs and there is a ladder stair to get to the bedrooms on the upper level of the unit.
One thing we learned is that the beds in the front bedroom (under the slanted roof) easily separate into two beds and fit well on either side of the door. If you're traveling with children this is ideal. Just be sure to make arrangements for the single bedding in advance of check-in.