If you mean Carlos & Gabby's, it's great! It's on Coney Island Avenue between Avenues J and K. They also have locations in Kew Garden Hills and Cedarhurst but I'm not sure of the addresses.
The Brooklyn location is pretty reasonably priced and the food has always been good. I like their tacos, burritos, fajitas etc. The guacamole could definitely stand improvement as far as I'm concerned. The burgers are great. I know it doesn't sound right to go to a Mexican place to get burgers, but they are just so good. I got a mushroom burger last time and it was fantastic. Also, they have a brisket sandwich I really liked.
If you want to eat cheap tacos that are extremely tasty, try Substational. They have two locations but the cleaner one is on Coney Island Avenue between O and P.
PS Love the screenname:)