Andrea's flat is well described -- it is bright and comfortable for one, perhaps two people for a short stay to visit the area.
It is, however a bit cramped if you need to spend any time on business. The desk/table is very small and hard to organize one's papers and or laptop.
I found the for the price to be a bit on the high side for the space given (based on my frequent visits to Paris and other proprieties I have stayed at and the amenities offered), but the location is prime.
Communication with Andrea was easy and she responded quickly to questions and picking up the keys was very easily done.
The elevator up to the 5th floor is certainly appreciated, especially for those with a bit of luggage, and as she has noted, there is just one flight of stairs to negotiate after the lift.
If you are visiting Paris and will be spending short periods of time in your room, this studio would be great for you!