Not bad, not bad, nice job.
Heh, I have a similar vocal style. High five bro. It's pretty cool, but as the other dude said, needs louder vocals. I certainly enjoy the horns.
Also, yeah, a little bit vocal practice wouldn't go astray, I mean, they're okay. But it might help you out a bit. And the guitar in the verses is a little too loud. Just turn it a tiny bit down.
Vocals were... not very good. The other instruments kinda drowned them out.
Also, I think you could use a bit of singing practice. Unless you were going for that.
In which case, just work on the vocal volume. Other than that, I think the music was pretty good.
And I'm rating this a 5 just to get the overall rating to about a two/three.
And omg, this is ska? Huh... so thats what ska is. Wierd.
Please contact me if you would like to use this in a project. We can discuss the details.