I don’t usually like the extremes of zero vibrato and very wide opera vibrato but your vocal performance is really nice and calming. For me a good voice isn’t simply hitting the correct pitches but the enunciation and expression both of which I thought were great here. Whatever effects are on the vocals they work great too. Actually if you could say what kind of effects/values are used on the vocal that’d be great.
My big criticism is that the guitars are simply too flat dynamically. There are parts where I think accents for a more distinct pulse would really heighten the song. I really love the guitar parts and they are performed well too, but the lack of dynamics changing just a bit and some accents don’t give me the right sense of expression. The harp harmonics at the beginning add a nice touch though. Not enough people use that technique, so kudos on that. 
The outro idea is very nice and works really well. Though after each pause it seems to come in just slightly too late, maybe a 16th or 8th note too late, it isn’t much anyway. Idk, it makes it sound unsettling to my ears because of that tiny delay.
Other than that I enjoyed listening a lot, thanks for posting.