At first I thought it was a 5 mic classic, but now I give it 4 mics.
Here's why;
1. Braveheart Party was terrible
2. There was no sub-bass. People from The South changed Hip Hop by adding sub-bass and sped up hi hats. If you listen to the stuff on No Limit and Cash Money (along with T.I. and Ludacris) from the same era, they all have that warm sub-bass that you can feel. It makes your body vibrate. Stillmatic, and The Blueprint, have no sub-bass. Come Home With Me didn't have any sub-bass either.
Basically New York producers weren't using sub-bass.
I think The Massacre had sub-bass but I'd have to go back and check.
Anyway, I'd give Stillmatic 4 mics because it wasn't flawless. It could have been better.