The three sisters McGuire indeed have a unity of blend hard to match among the many famous sibling groups. Their popularity was immense, and their cover versions of songs such as "Sincerely" and "Goodnight, Sweetheart, Goodnight," (both originally sung by the Moonglows and Spaniels, respectively) placed higher on the charts than those of their progenitors; the McGuire's sound and image was considered more acceptable to white audiences. While some of the songs, like "He," don't hold up as well over time - the lyrics and orchestrations seem a bit precious - the vivacious delivery is so unabashed, the apparently innate tunefulness so exact, and the arrangements so creative that "Muskrat Ramble" and "Sugartime" leave no doubt as to why the McGuires were loved by so many.