Rob and Justin really summed them up nicely.
All Hope is Gone feels like them trying to "do" Slipknot instead of it coming naturally, like a bad cover band. The light stuff just doesnt work like it did in Subliminal Verses (as in, its shit), and the heavy stuff feels like its just there because they couldnt get away with releasing an entire album of light, experimental rock under the moniker. And I actually LIKE the three heavy songs on the album (Gematria, This Cold Black, All Hope is Gone).. but it just feels hollow for the most part. That said, I more or less hated the album on first playthrough, but the aforementioned 3 tracks have grown on me, and I don't mind Sulfur, Psychosocial, or Dead Memories (!!) anymore. The rest of the album can pretty much go fuck itself though.
I've been listening to them since the self-titled album, and even though they have a pretty bad rap around these parts I'd say are worth looking into further.