I don't know if Cloverfield is a great movie but it can't let you indifferent. I don't know if Cloverfield is a unique movie: it surfs on the previous success of Godzilla meet the Blair Witch Project (the scariest movie i have ever seen after Shinning). I don't know if Cloverfield will remain in people's memory: it surfs on too many current trends (including Youtube like video style, things you half see, MTV generation... ) to know if it will still be "good" in a few years.
But i know one thing. During all the movie i was shaking. even once the movie was over.
Matt Reeves, the director, made a great job at finding tipping points and climaxes all along the story (he was behind the excellent "The Yards"). I am nearly scared to go to NYC in a couple of weeks :)
I liked it. Maybe you will (if you have a good heart)
Bonus question: can someone explain the meaning of CloverField? does that have to do with the name of the flower?