We (me and my two friends) stayed at Louises apartment in Le Marais for 6 days. The apartment including bed sheets and towels was clean and for the few days it felt like home to us :) It is small but really cosy! It's true the walls are rather thin so if you are a light sleeper I'd advise to bring earplugs. The area in which the apartment is located is just great: millions of cafes, restaurants, bakeries and shops (secondhand shops , little boutiques, jewellery stores,...). You'll find everything what the heart desires. On top you just have to walk around 10 minutes in order to reach the Seine and Notre Dame!!! The nearby Metro stations (Hotel de Ville, Rambuteau) are also in short walking distance.
All in all: We had an amazing time!
Thank you, Louise ;)