Alain's place was perfect for our five day stay in Paris. Yes there are stairs but what that gets you is a quiet, comfortable place to relax and re-group before the next day exploring Paris. The location is perfect - easy walking to many of the important stops for a "first time in Paris" trip. Great restaurants and bars/cafes are all over the area. We took a cab from CDG when we arrived (50euro) but then took the metro from Chatelet/Les Halles to CDG on the departure (10 euro) - very easy. Highly recommend this place for a great stay for two in Paris. Alain is an affable host who makes you feel very much at home.
Bon voyage!