One Man Army is writing some really fast and furious groove based thrash metal which will appeal to fans of Arch Enemy, Lamb of God, and God Forbid. Melodic guitar leads and solos (example: 'Nightmare in Ashes and Blood') is a good counter weight to the vocals which do maintain a consistent harsh style. The occasional clean backing voice is heard on a track like 'The Supreme Butcher' where some of those guitar leads brought me back to Testament’s "The New Order", but not nearly enough but more on that later.
Alice Cooper’s ‘He’s Back (The Man Behind The Mask)’ from Friday The 13th: Part VI is covered which I found an interesting choice being not so much a fan of the original and from what I remember it was always seen as cheesy. One Man Army give it some more justice with their very much heavier rendition also including clean vocals for the chorus. While the overall presentation to 'Error in Evolution' is fast, 'See Them Burn' slows down the pace with melodic leads and chunkier riffiery.
One Man Army I like, the music is really well written and in your face yet I would like em probably more without the cookie monster death voice. I think it would make them stand out more amongst the crowd because there are just so many of these bands that have harsh barking vocals. The main voice should be cleaner, still bass heavy, with certain words, even verses, accented by the deeper growl for maximum impact. You know how many times someone has said to me "Shit the music is killer but I hate the voice, it sounds like everyone else".