We had a wonderful stay at Liliane's! The apartment is lovely and extremely well situated -- public transport, supermarkets, (excellent) restaurants of all kinds, all on the street around the corner. Gare du Nord and Gare de l'Est are also both within walking distance. I was there for work, so we weren't in the apartment much during normal hours, but we really enjoyed the time we spent talking to (and learning from) Liliane. I know that I will want to stay there again when I'm next in Paris.