I've been going to Pollo Loco for at least 15 years (maybe 20?). They were here in Phoenix a long time ago, and I went often. Then there was some sort of franchise/corp shakeup, and they all disappeared. Then they came back about 4-5 years ago.
They're my favorite flame broiled chicken. Never had a bad batch. They used to have really good black beans, but then they pulled them. I prefer their med hot green salsa (guacamole maybe?).