This ranks up there with the best adventure films every made. Who could not love the first time they've seen this film, and the 'thump' 'thump' tremors of the approaching T-Rex. Crichton wrote an incredible book and Spielberg turned it to life like no other could've done. The special effects were incredible for its time (some scenes do look a bit 'fake' by today's standards) and this film single handedly started up huge marketing storm of dinosaur-anything for many years to come.
The original JP was also helped by having Crichton in control of the screenplay, whereas the sequel, Lost World, though based on a true book sequel, had someone else in charge of the screenplay. And JP3, well its a mess, only based on JP characters, with an entirely Hollywoodized screenplay. So there is definitely a big drop in quality between JP1, 2 and 3. Lost World is watchable, but do yourself a favor and avoid JP3 like the plague.
8/10