We really enjoyed our stay!
Soline provided us very clear instruction on entering the building prior to our departure date. On arrival, we were welcomed by Roselyne (sister of Soline) in the apartment. She is really nice and explained everything about the apartment in detail (including the laundry room). And the doorman is also very nice.
In 5 minutes walking distance, there are a basic supermarket and an award-winning bakery which we visited several times during our stay.
We walked everywhere, to Champs-Elysées, Ave Montaigne, George V, and Rue Du Faubourg Saint Honore. It's really convenient for shopping and fine dining! For places not in walking distance, the subway station is just 5 minutes away.
The neighbourhood is quiet and safe, quite a lot office building nearby.

The only thing I would mention/complain is the shower water, it's not very warm, even though I am not a hot-shower person. And trust me, don't even try to take a bath, the water will turn cold!