I have just read this about covers, written by Amy (aka @Burtini), although Amy has written this piece specifically about Hurt, it could apply to any cover. Well worth reading.

http://lipofthedaytumblr.com/

Maybe this link

http://lipoftheday.tumblr.com/post/1...my-perspective

Thank you very much Ben, I hope people take the time to read this, it is so heartfelt.