Jerome and Marcos apartment is perfect in every sense. The location is absolutely ideal. It is not only in the absolute center of Paris, but it also on Montorgueill street, which is the Foodie street of Paris. One could survive quite well by only dining out and purchasing food on the block that the apartment is located on. We had many meals both at "home" and dining out by just literally walking across the street.
The apartment itself is very stylish and clean. Although, it is located on a lively street, the bedroom was very quiet and made getting to sleep a breeze. We visited during the one of the big heat waves in Paris this summer, but the apartment was kept cool with the use of about four fans. As long as the shades were drawn and windows closed after letting in the cool night air, the fans did a great job of keeping the apartment about 10 degrees (Fahrenheit) cooler than the temperature outside. As an American, used to air conditioning, it was a moment of enlightenment. It is a valuable souvenir that I brought back bring with me to California. I actually chose to spend the middle of the hot days, between 2-6 pm, in the apartment because it was cooler than many of the shops and museums.
Jerome was very kind and communicative. He clearly wanted the stay to be as comfortable as possible and offered to provide an air bed for my adult daughter. He also was very good at checking in with me to see if I had any questions and to provide advice on where to eat or where to go.
I will definitely stay at Jerome and Marco's apartment the next time I visit Paris!