I have now stayed at Frederic's apartment twice. It is super comfy and homey. The kitchen is excellent with the right gadgets, and the home AV system is high end and easy to use. Wifi is also quite good.
This is a very comfortable apartment for one or two and the bed is big and restful.
Location of this place, in my opinion at least, can't be beat. Everything is in walking distance. I will stay here again next time I go to Paris.