More than a few eyebrows were raised when Danny Boyle announced that he'd asked Underworld to write music for the London 2012 Olympics' opening ceremony. While the veteran dance combo has produced some thrilling music over the years, their current output doesn't quite hit the heights of Underworld in their pomp. This career retrospective offers conclusive proof of that argument. By and large, the newer material such as the High Contrast/Tiesto collaboration just doesn't retain the enduring appeal of the older material. With classics like "Cowgirl", "Born Slippy", "Two Months Off", "Rez", "Mmm, Skyscraper I Love You" and "Dark & Long" (their tour de force) all present, Collection is a timely reminder of their talents. At their peak, Underworld were simply untouchable.