The vocals aren't too bad, but there are some spotty places. Still, I was expecting something much worse.

It sounds fairly well done. I'd change some of the reverb settings, but that's a personal preference more than anything. Where there some harmonies or double vocals? Sounds like it in a couple of places, and it adds a lot.

So yeah, maybe redo vocals, but there's not much else to do to it, really. I enjoyed it, I've never heard that song!

I'd be grateful if you'd check mine out:
Sunshine of Your Love cover