Instruct: Classify the given Amazon review as either positive or negative.
Query: Who Are These Guys?

They have found lyrics to great swing and jazz standards, and perform the songs with strong technique and great energy.I thoroughly enjoyed "The Song Is You," and am thinking about buying the Christmas album they made, too.Now, the tough part: who are they? If they read this review, please post some comments about who you are, where you came from and what interested you in doing this type of treatment of some wonderful old music!