Antoine's apartment is well sized for a Paris flat. It has a large living-room+kitchen and a smaller decent sized bedroom.
The toilet has its own small room separate from the bathroom which for us was very convenient.
The kitchen was well stocked so we could prepare and eat in if we wanted.
The flat also has a tiny balcony (terrace) with a beautiful view of Paris. Great place to sit and relax at the end of the day.
The location is great - next to St. Jacques station and easy walking distance (5 minutes) from Denfert Rochereau which is a central station with direct lines to the air ports and the city center. The neighborhood, while not central, has everything you need (cafe's, supermarket etc.) very close by and is well connected via metro and bus to the rest of the city.
Specifically we enjoyed the cafe at the corner right next to the house.
Antoine was very responsive and quickly answered all our questions and made sure we feel welcome and have what we need.