Very nice place. Fantastic location, metro line 6 station is literally outside your door. Bigger railway RER is also only 5 minutes away.
Place is small, no doubt about it, but very clean and everything you need is there. Elevator goes to the 6th floor and you will have to walk up the last floor to 7th. No biggie.
The bed faces the window with a view of Eiffel tower, at night you can lie in bed and get lost in its lights and the sounds of the neighborhood parties.
There are restaurants and bakeries , banks, laundry mats , bike rentals all within 10 min walk, theres always people on the street at all hours of the day, we felt very safe.
Place has no AC but is high enough that when you turn on the bathroom fan you get a nice draft of outside air.
Jean-Jacques was also a great host, went the extra mile to accommodate our arrival times (on a Saturday morning too no less) kept us in constant communication and was easy to reach.
Pack light, we barely have room to open up our two carryon luggages on the floor. If you show up with 2 big luggages each you are going to have a bad time.
Definitely recommend.