Thomas's flat is comfortable and cosy with some nice surprise features :-)
If you plan to use the sofa bed in the living room, note that there are no light-blocking curtains or blinds there. There is a bit of noise that echos from the internal courtyard but it's only the sounds you would expect from fairly respectful neighbours leaving their windows open on summer evenings, not traffic or nightlife noise.
The best feature of the flat is its location, a few steps away from one metro station and a couple of blocks from two others, making it ideal for visiting Paris. There is a bakery, a Chinese restaurant and a corner grocery shop on the same street, and a pizzeria around the corner doing EUR 5 "student pizzas" (closed in August). The Jardin des Plantes is a 15-minute walk.
Thomas is very quick to respond and very helpful.