This is a great apartment, perfect for 2 people for short stays. It is small to be sure, but has everything you might need -- comfy bed, good shower, sitting area and a well-stocked kitchen with fridge, microwave and small cooking area. But why cook? There are restaurants galore in easy walking distance as well as a grocery store. The Louvre is 5 minutes away and the Louvre-Rivoli Metro stop is even closer, making it very easy to get around Paris.
Charlotte was very responsive any time we needed to message her. Check in was easy, as was check-out.
I would stay here any time I visit Paris (hopefully soon again).