Greatest Hits is more or less the cocktail version of 2002's The Ultimate Collection. It delivers everything its predecessor does only in smaller servings. In all honesty, Who fanatics will have very little use for such a release. For all you casual fans, however, Greatest Hits will do the trick nicely. You get classic-rock chestnuts like "Won't Get Fooled Again" and "Baba O'Riley," plus killer mono versions of early hits such as "The Kids Are Alright," "I Can't Explain" and "My Generation."