The flat has an amazing location which is the main reason why we chose it - the neighbourhood around the Pantheon and the Sorbonne is full of historic sights and things to do. It's lively, yet not too noisy, and feels very safe. The flat is a stone's throw from a Metro station and very close to a RER train station (for direct access to the airports).
The flat is large enough for four guests if two people are prepared to share a bed and a duvet (there are just two beds). The bedroom is very quiet and we could happily sleep with a window open, while there is more street-noise at the night in the living room. It being an old house there was also some noise from the neighbours in adjacent flats (e.g. we could hear steps from upstairs and from the staircase).
The kitchen is fully equipped and we prepared meals there on several occasions. The flat looks a little more worn-out in real life as compared to in the pictures but it's on the whole clean and everything works just fine. All in all, we were very happy with our stay there!