Naturally, I'm biased toward Bill Marsilii and Terry Rossio. They are brilliant writers and the screenplay for Deja Vu is genius.
I've read the negative reviews that contradict the good ones and while Tony Scott's cameras make me motion sick, I can say this -- my daddy commits the most gosh-awful crimes against choice cuts of beef. He uses barbecue sauce, steak sauce, and even ketchup and I'm not entirely sure he doesn't use them all at once. But the fact of the matter is that while he finds it delicious and I find it nauseating, a sirloin is still a sirloin regardless of what he does to it.
The amazing screenplay for Deja Vu never lags yet the film often trudges through molasses. But even covered in molasses Deja Vu is still a sirloin.