Our family of hour (2 adults, 2 teenaged daughters) spent 5 nights in this terrific aparment and highly recommend it.
The location is absolutely superb. In the western part of the Marais literally steps to all amenties including groceries, restaurants and pubs. Short walking distance (12 mins or less) to Louvre, Pompidou, Tuilleries, Seine, Saint Chapelle, and many more. Across the street (literally) is the central train hub from which you can easily access any destination in Paris, including both airports. (But that doesn't mean it's noisy. The subway is well below ground level.)
The apartment is very comfortable and stylishly furnished. It has all the applicances and conveniences. Toilet paper, shampoo and lovely soft bath towels were all provided. The kitchen has towels and all the necessary cleaning supplies. The beds and pillows were comfortable, including the sofa pull-out. Windows provide excellent cross-ventilation and all have both sheers and dark drapes. The living room faces west so you can watch the sunset and enjoy a perfect view of the Eiffel Tower (which was thrilling to see - day and night). The street below is pedestrian-only so there is little or no car noise. With windows closed in the living room, you can't hear any street sounds. The master bedroom window faces away from the street and is very quiet, with or without windows closed. The small elevator (typical for Paris) works quietly, quickly and reliably.
Caroline and Loic are, simply, the perfect hosts. They are kind, caring, generous and responsive. The apartment was spotlessly clean when we arrived, with staples in the lardour and there was even a couple of cold beers waiting in the fridge. Their communication is outstanding and reply right away to any questions. We had a small hiccup using the door key which they immediately helped us with and maintained contact to ensure that all else was well. They provide an excellent instruction binder with clear, concise and easy to follow information about the apartment, how to find groceries, etc. The document they sent us on how to gain access to the building using the lockbox is the best I've ever seen.
We really hope that we get a chance to stay here again one day and would wholeheartedly recommend it to others.