Worth the wait.
The graphics are stellar. The A.I. is vicious and reacts in unpredictable manners, but sometimes it seems a little too frantic and uncontrolled. The level design is great, the physics are real enough if you don't scrutinize it with a magnifying glass.
I wish they would have limit the ammo a bit more, and I wish they would have limited the slots for guns to only two. Such as doing a handgun slot, and a larger weapon. I didn't like having so many guns to choose from all the time. The plasmids worked really well and the level of customization works for the game although for as hectic as the battles can get the need for a deeper inventory is rarely needed. I wish they would have made the walking speed a little slower and added a sprinting button. That would have added to the terror a bit. Overall the experience is dark, haunting, and memorable. I can't wait to get back to playing it again. And again. And again if I have time.