The first cool thing was a teaser for JJ Abrams Star Trek Movie... without showing anything or giving up any plot they made this Star Trek look super cool... That whole franchise has had it's ups and downs, hopefully this one will re-energize it.
Onto the movie proper...
What I really like about it was the actors were all so natural... they behaved in a way that seemed real for their circumstances... this is the area where most Horror flicks fall short...
I also like that you saw the monster in bits and pieces as the movie went on... no dramatic sweeping aerial shots that take away all the imagination and by extension all the fear...
I thought the special effects were OUTSTANDING... I don't usually like big budget CGI films because they usually feel animated... they add in useless stuff just because they can... Cloverfield only used it where it needed to be and with great success...
The bonus for me that Drew Goddard wrote it... He wrote great stuff for Angel and Buffy and is doing a bang up job on the Buffy Season 8 comic... and I think he did a GREAT job with Cloverfield...
All in all I have to give this movie two thumbs up and I can't wait to see which city goes down in the sequel...