Great location, lovely hosts! and cheap for Paris.. so you cannot expect too much, as it was quite dusty and it was in need of a refurbishment. Some wall papers were falling off. Bed linen and towels are very old and need to be replaced. You also need to bring or buy your own toilet paper!
But if you are not fussy about cleanliness - then this place is in great walking distance to Gare du Nord and other places. The restaurant below is run by a friend of Philippe and serves fantastic food !! We really enjoyed the convenience of this flat.