Definite spot in my top 5 of 2008 that's for sure (might be a hard struggle for place one with Opeth and Meshuggah).
For me the special Gojira-magic consists of their awesome melody lines on top of the musically interesting foundation provided by complex, yet earthshattering grooves.
About the discussion over their earlier album(s): I actually think that Gojira is one of the few bands who only produced kickass albums so far. There's for sure a more than significant difference in the quality of production, but the amazing and always interesting music is there on all of them. Using the adjective "monotonous" for their songs would fall into the same category for me as calling Meshuggah monotonous; grab some drumsticks, play for a couple of years and all of a sudden you'll see the richness and beautiful variety in their works.
Like it's always the case with complex art you won't see the actual details unless you know the basic makeup by heart, so be patient and listen, then I can almost guarantee, that you'll acquire the Gojira-taste and live happily ever there after
