After playing it most of the day all I can say is what a game! Lived up to what I could of hoped for.
Think the most striking thing is the fact that the world is living and breathing, people going about daily business, police chases, people getting to accidents, etc. Don't think I've seen a duplicate person yet!
Funniest part so far (don't worry non story) was Trevor getting tasered by some random hillbilly and when he wakes up, you are on the train tracks with a train come towards you, Trevor in his underpants in the middle of the desert miles from anywhere!