My experience reflects a lot of the other comments on here.
Nicolas let us check-in early which was kind of him and the arrangements to get the keys are totally hassle free. The flat is small but that didn't matter because we were out exploring most of the time. It's comfortable though and provides a good base. It's in a great area, there are lots of nice cafes nearby and it's easily accessible to everywhere we wanted to go. We mostly walked but on a couple of days we got the bus and metro which is close by. I would recommend, it's good value and in a great location. Win win.