Spent three nights at Christophe's studio last week.
The location is brilliant, in a quiet street by the pedestrian rue Montorgueil, bustling with great cafes and shops, walking distance to RER to CDG airport.
Christophe responded promptly to my late request to stay at his place, was accommodating in arranging for me to get the keys; he was responsive and thorough with information about access and practicalities.
The studio is well appointed and clean - I found the bed to be very comfortable.