With due regard for the overused word "Masterpiece," this isn't a "Masterpiece"; it's 3 masterpieces. This is a compilation of "Sing Ellington", "Hi-Fly" and the actual "Hottest New Group in Jazz." It's hard to argue which of the 3 is best, because all have their high points, and all have so very few low points. I love "Caravan", "Charleston Alley", "Night in Tunisia" (both takes), "Twisted", "Main Stem", "Mr. P.C."--oh, what the hey--maybe I should just list what I don't love about this, and make this review shorter! At the risk of sounding redundant viz. the rave I gave to "Sing a Song of Basie", listening to this reminds me of what a tremendous jazz singer Annie Ross was in her prime. Nobody--and I mean nobody--ever sang a straighter straight tone than Ms. Ross. And Lambert and Hendricks have that rare quality about them; individually, their voices aren't the best, perhaps, but together they work magically well. I'm probably writing to people who already know about this; if you are a rare one who doesn't, then treat this as the "Hot 5's" and "Hot 7's" of vocal jazz and buy it now. Your collection isn't complete without it.