This is a great flat within walking distance to the Champs Elysees. Erwann was very responsive, there is a concierge, Melina, that actually meets you and checks you in. Unfortunately she was not available when we arrived, but her nephew was there to check us in, he didn't speak any English, but Melina was available by phone.
The upside: very cute and stylish apartment, great location, lots of restaurants, shops, etc in the neighborhood. There is a combination washer/dryer in the flat. Very compact, but has everything you need.
The downside: The apartment was actually smaller than I had anticipated, although it sleeps 4, I wouldn't recommend it for more than 2 people. We only received 2 full size bath towels, 2 guests had to manage with smaller towels. The shower seemed to be clogged and wasn't draining well, Melina was able to get it fixed the night before we left. The elevator is only big enough to fit one person at a time with no luggage! We had to lug our suitcases up 3 flights of stairs. Do not count on using the elevator if you have heavy bags! We actually didn't bother using it at all.
Overall a great place, would only recommend for a couple, not a group.