Very smooth sounding, nothing was out of place that I heard. Empty space was filled pretty nicely. The only thing i suggest maybe is to pan some instruments a little bit off to the side to not have everything in the middle.
Other than that, fantastic!
Sounds like I'm trekking in the Old West... I like this type of guitar-playing more than your average shredding. I can hear the effort set into this, especially to keep the melody up with just an acoustic guitar and piano. It makes it even more awesome when that background metal kicks in, and it never takes over.
I bet a cowboy would've loved to hear this play while they round up their cattle, sweating under the sun. Too bad music doesn't randomly start playing in real life.
Please contact me if you would like to use this in a project. We can discuss the details.