We spent a week at Sabine's with our 1 year old. While the apartment is not really prepared for babies, Sabine was really accommodating and we really felt at home there (those Legos were a life saver, thanks again! ;-))
The place is super cozy and incredibly calm, a haven in Rotterdam. Perfect after a full day of visiting around.
I would say the only negative was not being able to use the terrace in the evenings as it was not in use.
Overall I highly recommend, thanks Sabine!