The stay at Muriel's house was awesome. The location is fantastic: less than ten minutes walk from the Arc de Triomphe, in a very quiet area and convenient to everything. There is a supermarket right in front of the building where you can buy groceries and the metro stop is very close.
Muriel was very nice and provided me with everything I needed, from the hair dryer to the washing machine, and she was always available for any problem.
The flat is even nicer in real life than it looks in the photos!
I really recommend it, it was the perfect accommodation for my stay.