My dad and I stayed at this apartment in the Marais for a week (Cecile offers a week discount rate). Cecile asked if we wanted 1 king bed or 2 twins, we chose the latter.
The windows open up to a beautiful Parisian street view and let in lots of fresh air. The location is superb, close to some of the most amazing restaurants I've ever been to. Public transportation was about 5-10 mins walking.
The apartment was very spacious for 2 people. It had a coffee machine, fridge, stove, and microwave oven. The grocery store is a 2 min walk. There's a hairdryer and straightener as well as other shower essentials. The shower itself is modern and tranquil, which is nice after a day of walking.
I was doing work here and the internet was ok. There were times I was on a VoIP call and the signal was choppy.
The stairs are definitely interesting and you need to be somewhat nimble going up and down, especially with luggage.
Note: if you don't want to pay Airbnb a foreign conversion fee, I believe you can book directly with Cecile. I wish I had done that!