Interesting stripped down sound. The song moves well.
Some crackling and popping is apparant. Like it's an old album.
Some pitchiness in the vocals here and there. More than a few vocal syncing issues. They're easy to spot on headphones. I'd suggest sending all the vocal tracks down the center - don't pan them.
Actually, even though I'm a big fan of doubling vocals, I think that for this song it's probably not a good effect. It's just a simple sound that is not well served by a lot of "effects."
A few extra seconds of silence at the end that could probably be edited out.