Pili pili is great for grilled meats and local dishes. The legume sauce is nice, and the grilled fresh fish is nice too. You probably burn as many calories trying to pry the meat from the Poulet Bicyclette, but that's a general comment rather than anything about Pili Pili in particular.
It can get rather hot under the thatched roof, but in the rain it is great. It is also fairly slow; an hour lunch will probably not be long enough. Good thing lunch hour in Benin is 2!