We stayed at the hotel (Sofitel) where the restaurant is located and dined at Renoir twice (also had breakfast twice). The restaurant has a formal dining area as well as a more casual bar area. First night we tried their formal dining. The service was excellent. The dishes were good (to be honest, we really liked the appetizers; the main courses were good) and the presentation was excellent.
Second night we tried the bar seating. It was cozy and comfortable. The dishes we tried (a hamburger and a roasted beef sandwich) were perhaps slightly underwhelming even for a bar menu. But the staff were very polite and welcoming.
A bit of a mixed impression from our breakfast experience. First day, the staff were very attentive and our breakfast was out on time. Second day was pretty much the opposite. Perhaps something was wrong or we were just unlucky at that time.