Pretty realistic, I could be anal about how they messed up on the geography, but I am fairly sure it's due to the technology at the time, There are a lot of funny characters everywhere, and whoever you encounter has an interesting path that landed them where they are currently. I do think Rockstar did a good job at getting the subway pretty close to reality to the best they could for the time. Though the noir lover in me feels like Max Payne has a pretty good portrayal of NYC too.