In May 2013 my family of three adults and four young children stayed at Elise's house in the Marais. We received a warm welcome and were allowed to drop off our luggage ahead of time. The apartment is compact, very attractive and contains all that is necessary for your stay. It is on the first floor with access from a private courtyard. The location is good with Republique nearby for the metro, Rue de Turbigo for the #75 bus to the Pont Neuf and the old market, Marche des Enfants Rouges at Charlot and Bretagne.
I strongly recommend the apartment but be careful with the tall floor lamp in the living room. Face it out from the wall. It could cause you grief.
Con Hamilton