LONDON—Pop superstar Madonna has once again wowed music critics and consumers alike with her latest offering, Hard Candy, an album that has garnered unanimous praise for the ease with which it can be exchanged for money. "Fans will find this record just as for sale as anything else in Madonna's wonderfully obtainable oeuvre," said NME staff writer Henry Carter, who also lauded individual tracks on Hard Candy as being available for 99 cents each on iTunes. "There's something here that anyone can pay for, whether they are longtime buyers of Madonna's albums or new to spending money on her music." Although Hard Candy has only been available for three weeks, its format of a two-channel 16-bit PCM encoding at a 44.1 kHz sampling rate per channel has already drawn comparisons to such classic CDs as the Beatles' Abbey Road and the Spin Doctors' Turn It Upside Down.