I thought the mystery surrounding the dome itself
was handled really well, and they did a good job making it's arrival seem genuinely creepy and ominous.
But unfortunately the characters and their various storylines just seemed a little too fake and cheesy to me. They never felt like real people, but instead the same kind of generic and artificial types you see in Revolution or Terra Nova or something.
I might keep watching for awhile, but I have a feeling as the story develops they're going to focus less and less on the dome and more on the cheesy characters, which is probably when I'll lose interest.