I found Stephen McGinity's review of Under The Dome delightful. The strenth is that he really is a constant reader. This gives him credibility far beyond most reviewers.
Thesis of his review: "In heft and length, King's latest house-brick can confidently stand in the company of It and The Stand. But can it match them for quality?"
Here's where he hits the nail on the head: "Like The Stand, Under the Dome is another meditation on good and evil from an author whose Christian imagery and spirituality is a hidden spring that flows through his work, unrecognised by critics clinging to his caricature as the bogeyman of American letters."
Check out his conclusion.