I've never had a Filet-O-Fish. I'm not a fish fan, especially one warmed under a heat lamp. My cousin Karen liked them until she had one and there was a piece of the fish's fin in it. I've also never had a Big Mac because the whole "special sauce" thing kind of turns me off... yes I'm a picky eater. The above ad is dated 1977, which is about the time Karen found the fin in her sandwich (hey it's a fish, what'd she expect?????).