I like the KETO Coco Krisp kind. It doesn't taste a thing like cocoa krispies, so don't go in expecting that, but the taste isn't bad and it's very filling. Atkins recently put out a new line of breakfast cereals in the morning start line. I really like the blueberry almond one.

KETO frosted flakes are soso. They are hard though and have that dense soy cardboardy texture.

Hot cereals I have the KETO banana nut one. No clue why since I don't like banana flavored things :\ I was disapointed in it. It turne dout extreamly runny and not at all filling.