The awesome thing is that it was built practically -- i.e. not CG! An extra reported they were raising and lowering Archie on the day she was on the set (although she didn't see it); Dave Gibbons alluded to an actual ship on set as well:
"Rain's falling hard now and I'm led inside, through a grubby little hovel crammed with dressmaking dummies, past the huge halls of Karnak, into Dan Dreiberg's homely brownstone and down to where the Owl Ship sits. I clamber aboard in giddy delight."
I'm excited about that Snyder & Co. are avoiding CG in this case, as it will serve to preserve to noirish-yet-"realistic", Taxi Driver vision they seem to be pursuing (i.e. -- the opposite of 300!).
As far as fidelity to the look in the comic goes, I'm not worried! I mean, take another look at those set pictures!... Haven't we put concerns about the general aesthetic/"vision" of the film behind us? Now is the appropriate time to get paranoid and belligerent about the actors' performances, geek-tards! I'm lookin at you, Jeffrey D. Morgan!*
* Only kidding. Don't kick my ass.