After a really quick confirmation I received message and email with instructions about staying => well described file about location, security, transportation, nearby tips such as groceries, bakeries, restaurants, etc. Everything was well enough described.
Communication with Alex and Mathilde was always quick and easy.
The day of our arrival, the flight was unfortunately delayed. As we arrived a bit later than we agreed on, Mathilde kindly waited for us and welcomed us in person anyway.
The day we were leaving, we were allowed to keep luggage inside the studio a bit later than our expected checkout.
(Once again, guys, thank you for that. It was pretty easy to agree on everything with you.)
Studio is nice and cozy. There's everything what you need for your staying. As we were visiting Paris in hot July, I really appreciated AC and fan.
"Little complain" may be a lower water pressure (but I guess it's common in this area, especialy in higher floors) and fridge is sometimes a bit noisy (but it can be easily "fixed" on spot :) ).
Studio is also well located for all "classic tourist runs" by foot and it's close to Metro/RER/Bus transfer station as well.

I can definitely recommend!