Myself and my boyfriend stayed at Kunle's apartment throughout our exchange year studying at Erasmus University Rotterdam. We loved the amount of space we had in the apartment and the great location in the North of the city (where all the character is). In the summer it feels like you are living in a treehouse as the sun comes through the large windows with the green of the leaves in the street. The area is close to the city, train station and Rotterdam's nightlife which we found to be extremely convenient. The place is perfect for a couple or two friends.
Kunle was a distant host due to his job taking him around the world, but I met him at the very end of our stay and whatever problem we had he was able to arrange a solution with us via Whatsapp.
Would only recommend for a long stay as the apartment is a blank canvas with the basic appliances and utilities. But this only means that you can really make the place your own over time.