Really Good, But....
I think your right, the mastering job wasn't that good. The treble on the brass section was a little high and on your voice to, which kinda made a "raw" type sound of sound similar to the band Bad Brains (Awsome Punk-Hardcore), which is good but i think just bit more bass in your voice would define the vocals from the brass,guitar,bass and drums. Over looking that SMALL problem i think you did a really great song!