My wife, 3 month old baby, and I spent a week in William's place and loved it. Are six flights a lot with a baby, a stroller, and baby gear? Yes, but William was great about helping us with our bags at check in and check out. In fact, he was really flexible with letting us check out late and store our bags at his place until our evening flight left. The location can't be beat - you are central to EVERYTHING IN PARIS - and literally right outside your door is the key subway station from which you can get practically anywhere, Les Halles. The space is nice and clean and things work as they should. We enjoyed our stay.