Serious Eats
Killer Cereal
New York magazine's Adam Platt loves his readers (and his job) as much as he dislikes granola. So, at his employers' behest, he reluctantly taste-tests 100 überhealthy cereals culled at random from the shelves of Whole Foods, rating them from 1 (worst) to 4 (best).
He tends to go for simpler, less sugary cereals, which is probably what appeals to the typical Arrowhead Mills product buyer, anyway. His highest ratings go to Honey Puffed Wheat by 365, Food For Life's Ezekiel 4:9, lots of Kashi products, fibery cereals from Barbara's, and Bear Naked granola. Nature's Path Organic Heritage O's, however, were proclaimed "the purist's favorite."
As someone who spent her childhood happily devouring boxes of these superior Cheerio substitutes, I would say this is a reviewer you can trust.