Time Out says
Chez Prosper welcomes punters all day long with that simplest of gestures: a smile. Yes, even when squeezing past people queuing for a spot on the sun terrace, the waiters are positively beaming. The traditional dining/drinks area - tiled floor, large mirrors, wooden furniture - is run with military precision, and orders arrive promptly. The steak-frites and croques (served on Poîlane bread) are hearty, and the naughty Nutella tiramisu is worth crossing town for.