Which device actually recorded the sound? The camera? It sounded sluggish to me, but some nice guitar work... how long have you played?
I think it could sound much better if you recorded all the tracks directly onto your computer. I don't know how much of this you do, but I just picked up an apogee DUO and it works great with garage band. I don't even play an instrument (used it for recording dialogue for our websites, videos and web events) but my buddies that do play absolutely love the thing.