Jeff Wells liked Cloverfield:
Cloverfield is a monster film unlike any other -- a complete original, but no less of a rock' em-sock 'em for that. It's amazing in that it's so short (by my watch about 74 minutes without credits), and yet so fierce. If Allen Ginsberg hadn't already used this I would suggest that they call it Howl. This is not your father's Ray Harryhausen rampaging monster flick. Those movies, comparatively, were parlor dramas for the tame of mind. This movie is REM madness. It is Guillermo del Toro on a tab of brown acid with a little crack thrown in.