The roll patterns are wrong.
Any google search for "Apollo 11" will give you a zillion pics of the right paint pattern, so there's really no excuse for getting it wrong.
And of course, it's a really really crappy "scale model" because the shapes and proportions are all wrong, and of course the real Saturn V did not have big plastic ridges running up and down the length of the airframe.
I have a very mixed view of Lego's. Like most kids I screwed around with them for a while as a kid and then quit. (When I was about 6-7 years old.)
Now I have a nephew who is 12 who is really really into them. (Much more than rocketry.)
The Lego sets are pretty much the boys' equivalent of Barbie dolls in that you can keep ordering more and more and more accessories "Sold Separately At A Nominal Price." Guess what, the prices ain't that nominal.
They do promote creativity, but only up to a certain point -- if you want or need specific color, sized, or shaped parts, you cannot fabricate them -- unless you have a full-fledged plastic molding plant in your basement, your only option is to order them from Lego. At A Nominal Price.
They're better than the kids doing drugs on the street, but basically IMO it's a big racket.