In some ways I think they gave TOO much away. While it's refreshing that we basically know what this thing is (bizarro giant clever dangerous alien sea monster) and the various incidents that set up its characteristics were cool, the characters all have this incredible ability to instantly jump to the correct conclusion from the snatches they see.
I'm also not a big fan of the characters. Reclusive single-minded genius children are always bad, but the oceanographer mother (the crazy bitch who threatens to cut her child's teddy bear) and her kid take the biscuit as the most annoying characters this side of Joey.
Still, I might watch the next couple of eps to see how it pans out. I enjoyed the pace and the quick cuts from scene to scene, and I do like my crazy scruffy foreign scientists. It could take an interesting turn if they keep up this pace, because we'll surely find out about the monster sooner rather than later.