From what I'm seeing here, overall the final product looks pretty great to me. I'm not enough of a fanatic to notice every little minor suit inaccuracy so even stuff like the mask doesn't really bother me. When I look at it I see the Iron Man I remember from the first movie which is what I'm looking for. I just hope the figure scales well with the other 1/4 Hot Toys figures I have, otherwise it could look really out of place.
Coincidentally I just got a flexpay schedule change from Sideshow for this guy too pushing it back to December. We'll see if I end up getting it as speedily as Vader.