We really enjoyed our stay & definitely recommend the appartment! The place is just as described, small but sufficient for a couple. It was very neat and clean and has everything you need regarding kitchen appliance, huge TV with cable, cozy bed. There are 2 metro stations 4 minutes walk and a supermarket just next to the building.
Jean-Sylvian is a great host! He welcomed us with a tasty cake and was very kind, we arrived late at night and he didn't have a problem with it. If you're looking to stay in Montmartre this is the place!