I really like this show. Some shows have a nifty premise that makes me really curious and I enjoy a few episodes and then I just get bored and give up . Revolution) but I feel Dome does a good job of continually moving forward, using individual episode stories, mini-story arcs (like the war between Jim and that farmer) and the ongoing story arc to keep viewers engaged. The series always offers enough new things - mini dome, military chatter, murders - to make it feel like its skimming along even if we never really seem closer to finding out what's going on. I do, however, feel Big Jim is becoming a problem; he's an interesting character, but where can you take him at this point, now that his evil is fully developed?
I am also fascinated by the reviews on this site, because almost everyone here either gives it a 1 or a 9/10. It's so weird how hostile/enthusiastic the responses are. A lot of the 1s seem to be from people who read the book, so I guess they're not getting the series they imagined in their head. But 1s or 10s, most people aren't bothering to really explain why they feel this way; they just say "it's awesome" or "it That's why, even though I wanted to start by talking about the reviews because it's such an odd phenomenon, I started with my take on the show and why I liked.
For me, Under the Dome and Haven are the two most successful King-based series. Now I'm going to go read the reviews of Haven and see if these weird review extremes have something to do with Stephen King.