I was really disappointed with the final product. I wouldn't be uncomfortable saying I outright hated it. I was expecting vampires and the "still alive" societies of vampires I know within the novel, and the great ending too (FYI, book's ending >Movies' ending times infinity). But no, we got people turned mutants by a vaccine meant for the good of mankind (honestly, we've received films like these at least once a year in the past decade). I'm sure the shift of the dark seekers from intelligent-people to intelligent-savages was meant to provide some thrills, but they just never come (even the closest moments, they are cheap at best). It doesn't help that they looked like crap, either. Let's not forget Will's one liner's make just make it annoying. "Eat your vegetables, I'm not playin'!", "Who's that girl over there? Maybe I should say hi?", reciting Shrek. Thank God he didn't go "Aww... HELL NAW!", that saves this movie from being completely unwatchable. Leave the hip-hop attitude in Bel-Air, Prince, you're not fresh anywhere else.
In short, Will pisses over Matheson's work, but nowhere near as much as he pisses over Asimov's work, watch it once when your friend rents it from Blockbuster and then wipe it out of your memory, and ultimately proves that Will Smith still hasn't had any othrt good movies except Pursuit of Happyness and Men In Black