Wonderful tune, very well performed. The mix is on the slightly bright "to midrange" side IMO ... not too bad, but enough to raise the needle on my "wince meter" slightly. It's not as noticeable in the guitar(s) (which are supposed to sound bright) as it is in the vocal ... where the midrange "elevation" is more apparent -- particularly as the vocal gets strong and is joined in harmony.
Like I said, not too bad, but my ears noticed. Also, a bright/midrange tone to a mix can be the result of compression. I'd back off a bit on that and see if it changes the sound. Either way, a mastering engineer could easily smooth things out.