The tracks The Three Degrees made with Philadelphia’s Gamble & Huff production team were so smooth that they seemed to float away on their own design, but underneath the fluffy strings and all the hustle and flow were a couple of songs that are simply stone-cold classics, including the inescapable “When Will I See You Again,” the warm, uplifting “Take Good Care of Yourself,” and Gamble & Huff’s own brilliant self-advertisement, “T.S.O.P. (The Sound of Philadelphia).” All three of these are here, along with other easy flowing tracks that move in the same neighborhood, making this a fine and generous introduction to the Three Degrees’ most commercial period.