Claire's place is as described, very accurate. Her flat is in the perfect location on the edge of the Marais and right by Centre Pompadou, don't think it could be more convenient. She isn't kidding about the stairs, it'll keep you fit and healthy and I would recommend, but if you really have issues with stairs and are going to be critical later, probably find a first floor flat. Access and Claire's instructions were spot on. She is very communicative and was great to talk to. You'll love the neighbourhood, definitely worthwhile. Also, if coming from Orly or CDG, very easy to access by metro.