I recently stayed in a lovely loft apartment in Le Marais and had a great experience overall. The apartment is located in a quiet neighborhood, about 7-12 minutes from multiple metro spots. Despite the tranquility of the street, the Le Marais neighborhood itself is lively, with lots of fantastic cafes and stores. There are markets and bakeries nearby as well, making it convenient to grab fresh food and pastries.
The courtyard is charming, and I didn't have any interactions with neighbors, which added to the sense of privacy. Inside, the apartment was clean and exactly as advertised. One minor issue was that I couldn't get the sofa bed open, and the sofa itself wasn't very comfortable because it shifted when you sat on it. However, this wasn't a deal breaker, and I didn't feel the need to mention it to the manager.
The amenities, including the TVs, kitchenette, and washer/dryer, were great and very useful during my stay. Communication with the host was good, but I recommend using email instead of the app for faster responses.
I felt completely safe walking through the streets late at night, and the apartment was spacious enough to provide privacy between the loft and living area. I would definitely stay here again if you enjoy exploring the neighborhood and want easy access to the metro and cafes.