I give it a solid 8/10.
I have listened to it regularly over the past 6 days and not only am I not tired of it(I was with Boots a bit) but I find myself humming it and wanting to hear it again.
Being that this is named "Red EDIT", I strongly believe that the album cut will have a slightly longer intro(love the intro btw) a slightly longer ending, an additional couple of lines and perhaps the solo will be slightly extended. All told up to an additional 30-60 seconds, which is a lot considering its a 3 min 40 sec song.
With that said, my feeling is that this is going to be more like an "All I want is You" single, in that the album cut is better(vs a "Please" or "All because of You" single, where the single was better than the album cut).
IF that is the case, I can see this song going to a 9/10. Folks, this is a really good tune!