I had a great experience staying with Gregoire in Paris. The room was exactly as it appeared in the pictures, and the balcony was a lovely addition. Gregoire was very accommodating, and even kindly let me borrow an umbrella as I was unprepared for a Parisian downpour. For the location, value and accommodation, you can't go wrong with Gregoire's place.
However, if the smell of cigarettes bothers you, I would not recommend this room. The pillow and blanket on the bed sometimes smelled of cigarettes, though I was able to smother it by covering the pillow in a towel.