I tend not to like jazz reworkings of Christmas carols. There's almost always a kind of levity that either borders on or crosses over into irreverence. And for that matter I'm not fond of classically-trained voices singing anything except classical music. But this seems an exception on both counts. A friend sent it to me, and she seemed to have the same basic reservation that I do, but added that "they perform it with reverence within that genre." Just so. At least Kathleen Battle does. Marsalis mostly does, but I could do without the wah-wah stuff.