I found the guitar work to be very clean, and while not cutting edge, it lends itself very well to the "feel" of the piece. Don't get me wrong, it was excellent use of instrument.
Of the four songs, I have to admit that Go! was my least favorite. It felt repetitive and shallow. I will give it a few more listens before passing final judgment though. The remaining three, however, were simple outstanding music. Highly recommended.