Now this is really epic! composition, production and mastering all flawless!
There's a really great sense of tension in this with the ever building progression and slow build up. I especially like the segment around the 1 minute mark with the guitar and horn having a slow moment before returning to the build up.
Though the build up is great, I feel it takes up too much of the song.It's like 75% of the song is and intro an it gets to a point where I'm thinking "where's the climax? the chorus?".
However that really pays off at the 4.16 mark! :D I really love percussive vocals like that! That whole part was definitely sweet spot of the song and really made it work the wait. Though I shouldn't really have to feel like I'm waiting when I'm listening to something as epic as this. If that segment had come in just a little earlier it would have been perfect! but that's my opinion.
I mean there's nothing wrong here It's just a small issue with structure really, just something to take in consideration for future purposes :).
Still amazing work!