While they sound very derivative, Riverside are capable of creating interesting melodies and sounds that should appeal to any fan of modern prog metal bands like Porcupine Tree, Pain of Salvation, Dream Theater and Tool. It somehow lacks the sophistication of those bands, though. "I Turned You Down" is an absolute gem.
The individual tracks on here are better than any other Riverside album - but I don't feel it quite so well as one continuous piece. Possibly the intro/outro tracks spoil that for me. But the epics, oh yes.