This statement from a review i read before i actually went and bought With Roots (i had heard it though) pretty much was how i was trying to describe it to people. I think it sums up the feeling you get from the entire album quiet nicely. At least how i feel about it. It's a good science behind With Roots.
"Just when you've been sufficiently pumped up by the screaming and growling, the clean, high-ranging choruses break through like a burst of sunlight and carry the track along with beauty and energy."