I spent 3 days at Caroles place and can highly recommend it. Carole is a great host, who gave me tips on what to see in Paris, and also let me stay almost half a day more for free. The place is at an amazing location (and the price is very good, other placed cost double), where you can actually see the Notre dame from the street! The home was super clean & with great decorations. There are two metro stations within 5 minute walking distance, so you can basically visit every part of the city in 15 minutes. There are great restaurants nearby, a shopping district on the other side of the bridge, and a groecery store right next to the flat (which is open till 22:00 so you can spend the whole day sightseeing and only have to shop at the very end). I highly recommend it!