Wow - what a great place to stay! The apartment was comfortable, stylish and brilliantly located. Inside it was just as described in the listing with comfortable beds, a fully-equipped kitchen, including things like tea and coffee, a pleasant living-room and plenty of plug points. There was plenty of space for two couples. It is also great to stay in a place which really feels like someone's home rather than just an apartment that is only used for holidays. It had a lovely homely feel to it, with plants and also plenty of books available to read in both French and English.
As for the location, it was very close to the Arc de Triomphe and Champs Elysee and within half an hour's walk of the Eiffel Tower. Charles de Gaulle Etoile metro station was five minutes' walk away, and it was also very close to a covered market, a street market, a supermarket, a great boulangerie and plenty of restaurants.
Charles's mother Margaret met us on arrival and was easily contactable throughout our stay. I would definitely recommend it to family and friends as a place to stay.