I've been going to Machu Picchu since it opened in 2003 and it was always my favorite Peruvian restaurant in Panama City, because of its excellent traditional (not nouveau) cuisine. The owner and always present host there was Socartes (Peruvian). He was forced out of Machu Picchu due to illness and a falling out with his partners. He has recently opened Mar de Grau (the name of the Pacific Ocean in Peruvian territory) and has brought over servers and chefs from MP. The food is just as good, if not better, and the service is excellent. My favorite dishes are tiradito de corvina and aji de gallina. Great pisco sours. Prices are reasonable. Definitely worth a visit.