How bad is it? It's one of the worst giant gorilla films, which is a big field.
Should you see it? Sure.
Scott Brady and Anthony Eisley are the biggest names in this extremely poor King Kong wannabe film. There's an extremely long expedition to a plateau with plenty of stock footage and a witch doctor that's embarrassing. There's a bad actress love interest. There's a T-Rex that's sort of a hand puppet just shook in front of the camera. And then there's the monster, seen only from the waist up (I hope this was an attempt to make him look bigger, but I think they only had half a costume) and with mismatched eyes and non-moving mouth.