Thanks for your input MB. I've listened to it again and I finally can verbalize some of it Her voice is well suited to his guitar style. They compliment one another. This is us is my favorite song so far. Their voices when they sing together took some getting used to. Usually you find people doing duets have voices that blend. Theirs do not to my ears. Not that they don't sound great it's just a different sound than I was used to.