I actually really enjoyed that movie. Avoiding any spoilers for anyone who might wanna watch it - I do agree that the ending was a little silly, and it was obvious that the producers decided to make the "Cloverfield" link to get more viewers/interest.

But it was an absolutely stellar performance by John Goodman, and the lead girl played the part very well too IMO (I forget her name). The suspense in the bunker really had me on the edge of my seat, and even though the ending was a bit dumb, it was very gripping for me, saw it in a cinema with a pretty good, loud sound system...