He is, but he isn't. OK, his production style is very smooth and stylistic, he makes everything sound very clean... I don't like that. Their have been so many bands that he took the edge completely out of their sound. Red Hot Chili Peppers, System of A Down (I still like their first album), Audioslave (Rage's tone was much better ala Evil Empire and s/t). For non agressive bands, Ruben's style would be fantastic, everything sounds great. But it has no edge. Meh.