We loved the flat. The pictures show exactly how this space is charming, cosy and gives that expected "Paris feeling".
We spent a week with our two kids (6 & 7 yo) and the size of this flat was good to accommodate the four of us.
Marais is such a great neighborhood, with a lot os shops, supermarkets, restaurants, bars, and boulangeries.
Tony was easy to communicate and Natasza was incredibly welcoming and supportive.
We certainly recommend and would stay again in this flat, however I would highlight two aspects: (a) the sofa bed as it is now fits well 2 kids, but not 2 adults and (b) the street can be very busy and noisy at night, specially during weekends. The bedroom is protected from the street noise, even with the windows open (it was so hot!), but if someone is sleeping in the living room, he/she can be bothered by the noise from bars and restaurants.