Sergio,

It was beautifully done. Really well written, and great job on the guitar as well. My only comment was the transition to the Piano solo was quite sudden (although it built up nicely back to to the tune). I liked the piano part so I would leave it in... but two suggestions, maybe you could build to a bigger peak just before the piano part - your guitar goes down and finishes the phrase - maybe it could go up to a tonic (or even to a 6th or 7th instead of the tonic) and crescendo in the bar before to make it more of a tension/release. Also maybe If you had a similar piano intro at the beginning the listener would be aurally prepared for it.

Really Beautiful!

Note: take any of my comments with a grain of salt - I'm about as amateur musician as you can get.

Bart