Check out this amazing detailed and massive Saturn V by LEGO Professional Ryan McNaught. This is surely the MOC by which we will judge all future NASA MOCs. You can read some details in this article. BTW, if you're down under, get yourself to Melbourne next week for the Brickvention gathering, where you'll be able to see this in person.
Oh, can I say it again, this is massive. 5.6 meters tall, to be precise. That makes it, I believe, true to minifig scale. See here with Ryan for scale: