Charly and Adrien were amazing hosts. They provided everything we needed and more! Very prompt about answering any concerns as well. Their apartment is lovely - very stylish but also comfortable. We were traveling as a family of 4 for a week and felt at home right in the heart of le Marais neighborhood (by far my favorite area of all of Paris - highly recommend staying here!). The subway is a 10-15 minute walk away which is also very convenient when trying to get to different areas of Paris.
Two things to consider: 1) You do have to walk up 6 flights of stairs, which my family didn't mind, but those staying should be aware of this feature. Great views of the Paris rooftops, though, as a result! 2) The shower is in view of the bedroom, so you will have to wait in the living area if/when someone is showering. Not a big deal because there is plenty of seating in the living room.
If you'd like the luxury of having the option of cooking, which we took advantage of quite often, this place is much more comfortable and economical than a hotel in the city/the area. The AC is great in case there is a hot day, and works very well. Beds and pillows very comfortable! Will be back :-)