Let me start by saying that the location is perfect, you're literally in front of a bus/tram stop and 5 minutes away from a major train station, so moving around the city (and beyond) is never a problem. The apartment is awesome with an adequately equipped kitchen with oven/microwave combo and a mini fridge, the bedrooms are spacious and the beds really comfortable. The rooftop is also a big plus although it was a bit too cold to enjoy it during my stay.
Moreover Arnold communicated clearly and was available for supporting us through our stay, so great host!
The only downside but also a part of the dutch experience are the stairs you need to climb to get to the apartment - they are pretty steep so be ready for some cardio. For parents with little kids, I'd recommend also thinking about ways of securing the access to the stairs to minimize the risk of accidents.