Righteous Kill
Of course, it's an acting masterclass, and it holds your attention, although the ending is rather predictable. Obviously the studio spent all their money on De Niro and Pacino, leaving not much for anything else. It would make a fine episode of CSI, but stretched out to 90 minutes it struggles to keep going. 5/10
PS Robert De Niro does that very annoying thing when he gets really angry it looks like he's going to cry. A lot.