First of all: Fabiana and Rocco were the nicest hosts! They were waiting for me when I was arriving around 11 in the evening and gave me a comprehensive tour in the apartment and made me feel at home and also made sure that I know that I could ask them anything and at anytime I would need to. As I wasn't in the flat most of the time but out to explore Rotterdam I didn't get to speak the two very often, but nevertheless the communication was easy. They have a well equipped book shelf with a lot of information about Rotterdam, the Netherlands and their renovated house!
The location of the apartment is perfect as the tram stop is technically right in front of the house which is a great benefit if you are lucky enough to experience some real Dutch weather.
All in all it was the perfect stay and I am pretty sure that I will come back.