No, the dinosaur effects are not Jurassic Park and yes you can see the strings on the pterodactyl, but other than that this is a great flick. Had they been provided Harryhausen effects, this would be an all time classic. Everything other that the dinosaur effects are a bullseye. Gotta give Doug Mcclure some credit as a likeable enough hero. Great acting, good story and believable characters make for an awesome 90 minute diversion. The first 40 minutes when the sub and battleship battle looks great. I have always loved this flick and it's sequel, The People That Time Forgot. Widescreen DVD, anyone? Perhaps a double feature DVD with both parts? Wouldn't that be nice....