Wow, what a fantastic movie! I really enjoyed how more in depth the storyline was to the original, including how we got to see the inner workings of the proton packs and Echo1. Hard to watch some parts of the movie without sheading a tear or two. If you saw the first two films in the theater as a kid, then this one will be very nostalgic. Harold Ramis is as much part of this film as the first two. Stay after the end of the credits, there is more a bit more to watch. Best movie of the year so far!!!