I have to say that I went in totally blind to it (I only knew that it was a JJ film and that something mysterious was attacking NY) and I actually enjoyed it. Perhaps it didn't have an amazing thought-provoking story, but that really wasn't the point of the film. We were meant to see the events of the Cloverfield as they were seen by Hudd and his group of friends. We were not supposed to be omniscient, viewing the film's events from above and having everything explained to us. That's how a typical director would film this type of movie. Instead, we got to experience a different kind of feeling - the feeling of being right there amidst the terror and confusion, including the feeling of a touch of nausea. It definetely worked for what it was. The people who are disappointed in it are those who wanted this to be told from a different viewpoint or who unneedlessly hyped it up for themselves.
Am I a little disappointed in not knowing how the creature originated and what happened in the after-math? Of course, as I'm sure we're all curious as that is human nature. However, it would have been far more absurd to have an explanation thrown in at the end after the whole movie was told in a first-person narrative. How often in life are we going to have all the answers? If the answers would have been revealed to us we wouldn't have been able to connect with the protagonists as well as we were able to in this film. We only know what they know, nothing more, and we're experiencing close to what they went through in the process. Cloverfield is a hauntingly beautiful piece of a horrific life-changing experience shown through the eyes (camera) of an ordinary man caught in the middle of a situation he has no knowledge about. It truely is a movie experience like no other.
I have to say that I think this movie would make an awesome thrill ride at Universal Studios. Also, I <3ed Marlena and her sarcastic comments throughout the film.
It's a shame she had to explode!