When "Mothermania" was released there were already several compilation albums of The Mothers Of Invention floating around. Except for "Mothermania", none were compiled or approved by Frank Zappa. On FZ's only approved "best of The Mothers" collection, we get four unique mixes of four songs, which makes this release essential for the Zappa fan who needs EVERYTHING! "Mother People" has the verse that was censored out of "We're Only In It For The Money" (which includes the wonderful lyric: "Shut your f-----g mouth about the length of my hair". "The Idiot Bastard Son" features a short intro that was trimmed for "We're Only In It For The Money", and it also omits the mid-song dialog that ruined the flow of the song. "Call Any Vegetable", which consists of three parts and runs about 8 minutes on "Absolutely Free" is trimmed to a more digestible 4:23, by omitting most of part 2 ("Invocation & Ritual Dance Of The Young Pumpkin"). Finally, we get the alternate edit of "It Can't Happen Here", which has the piano ballet interlude removed, and adds an extra line of FZ's dialog with Suzy Creamcheese. For me, as a Zappa fanatic, "Mothermania" on CD is a long awaited, essential collection.