I stayed at this apartment for the final 10 days of a 2 month visit to Europe---business and pleasure.
There is much that is positive: the area is great. You are near Bastille, so you can catch a metro anywhere you please. If you head just a bit to the east you find some of the most soulful neighborhoods in Paris. The apartment is exceptionally clean, and opens to a courtyard. Air conditioning is a big plus in the summer.
But I wasn't at all happy with my stay. First, the place is much smaller than it appears in photographs on airbnb. I can't imagine using the sofa bed -- there would be so little floor space. Then there is the layout. It feels like it was formally a shop, with a big shop window and no other source of natural light. There is a curtain to provide some privacy, but being on the first floor you feel as if you are in a fish bowl.
I was also very unlucky. The power to the apartment went out in the middle of my stay. I wrote an urgent message, but received no response. I called, and was told to press some buttons, and was finally told someone would come for repairs the next day. The electrician came twice, the second time interrupting an intimate moment. He told us that the electricity was shut off by the utility, so must likely an unpaid bill.
Audrey was completely unresponsive to messages, unless it was something that concerned her (such as, what time are you leaving). For example, no updates on when the power would be fixed -- I had to telephone on my dime.
And I had comments early on about supplies -- no response at all. Here it is, which should serve as a warning for future guests: "Some suggestions for future guests -- items I usual find at my stays: salt and pepper, dish washing soap, a hand towel (paper towels also nice), and perhaps slightly larger cups for a nice cup of tea! I'm using your shampoo for washing dishes, and doing ok with tea in my allonge' cup :-) So don't worry about me, just a head's up.
Oh, and maybe it is just me, but I find the bathroom a bit scary after a shower. It is so slippery! I have lined the floor with towels so now feel safe."