Got mine yesterday.
The iris scanner is fantastic. Works even in the dark very quickly. Easy to setup, easy to use. Who needs the FPS. Also, I don't wear glasses but use a pair of Gunnar Optiks at work while sitting in front of the computer all day. The iris scanner had no problem unlocking even with these on, and I have the yellow tinted lenses.
As someone already said, setting the home button to unlock the screen is a great feature and I use it all the time.
As for the red tint some have noticed, I did not. I did notice that if you turn the blue filter on it gives the screen a red tint though. Perhaps some people inadvertently turned that on?
I changed the screen resolution to the highest right away. Looks amazing.
Haven't gotten much use out of the camera yet, but looks good so far.