Tamba Hali is very good and opposing offenses have to account for him. That's why he was voted the NFL's 84th best player in NFL Network's top 100 player countdown. The clip on Tamba's ranking included a few good quotes about him from other NFL players.
Raiders FB Marcel Reece: "Tamba Hali does so much int he pregame. I've never seen a pregame workout the way Tamba does. He's out there doing martial arts, doing track stuff, he's running sprints, he's at a full sweat. He looks like he just finished an overtime game and we haven't even started.