Eve's place is so cute! Everything was spotless and she had fresh flowers and a very thoughtful guide to the house and neighborhood set out for us along with guidebooks and transit maps.
The apartment is about 20 minutes from Sacre Coeur and the more picturesque parts of Montmartre. The immediate area is much quieter and less touristic, which is nice.
FYI for American guests, 4th floor in France actually means 5th floor (ground floor is 0). Just be ready when you have to lug your bags up.