Overall, we enjoyed our stays at Flavio's studio and it served our needs.
Flavio is very quick on responding and let us check-in around 1:30pm. The check-in instructions are easy to follow and we had no problems. The location is very convenient, about 2 minutes walk to Metro 8 and Bus 86 stations. There is a grocery store Carrefour across the street, literally less than 10 steps, so we bought breakfast there and use the small refrigerator. There are many restaurants within walking distance, with a wide price ranges, so you don't need to worry about dinners. I feel safe in this area. One day, we took a night boat ride along the Seine River and came back after 11pm by Metro, a lot of the neighborhood restaurants are still open and a lot of peoples are still sitting outside the restaurants. There is a nice bakery store around the metro station that I bought some breads to take back home. The studio is very clean, exactly as pictured. There is a small refrigerator and even a small dishwasher which is very nice. The kitchen has stove tops and microwave. Wi-fi works well.
The down side is the studio is small. It is good for two persons, but for three or four persons, it is very small as you will need to use the sofa bed; unless you put the soft bed in the sofa position every morning, you are left with very small space. If you are outside during the days, and only come back to sleep, It is not too much of a problem. There is ventilation, but insufficient and sometimes the apartment is hot and humid depending on the weather. There is no windows. For certain days of our staying, we were so tempted to leave the door open so that the cool night air can come in, but apparently that is not a good idea so we did not do that. Most of the nights, we had to leave the fans on to stay cool.