I actually saw this movie in the theater when it was first released. The movie was so bad, and so badly marketed, that promo stills in the theater lobby never appeared in the film! The "not so" special effects are as bad as they can get, the acting is universally poor (especially Carl Ottosen as the American General Grayson) and portions of the movie involving the monster are filmed in different stages of focus/clarity. However, the scenes involving the cast of live characters are of high quality stock and have survived quite well over the past 50+ years. It is a film that will give you a few laughs and may be a way spend a rainy Saturday afternoon. The best (and maybe the only way) to watch Reptilicus is via MST3K!
Review of Reptilicus
