Stephane was waiting for us at the apartment which was very easy to find since it is a 4 minute walk from the St. Michel metro station. The RER B takes you directly from CDG in approx. 40 mins. He showed us the big, brighly lite apartment with all the necessities to eat in. All the appliances worked perfectly, very hot water ,hardly any noise from the outside so sleeping is good. Oh yes you can even call home from his phone and the internet is very fast.
Also Stephane gave us a tour of the area which was educational even pointing out a couple of restaurants.(Beef Bourguingon at the Quartier General was excellent).
Ok now, there are many narrow stairs( 3 stories). to climb so beware. but Stephane gives a hand to bring up the luggage.

You cannot get a better situated place 5 mins to Notre Dame, Conciergerie, St.Chapelle. 15 mins to the Pantheone and Cluny Museum. 2 minute walk to St. Germain des Pres. Take bus 86 or 87 to Bastille for the famous Sunday market.
Really this place is awesome. Merci beacoup Stephane au plaisir.