In 2004, MSNBC ranked Pink Floyd number 8 on their list of "The 10 Best Rock Bands Ever". In the same year, "Q" named Pink Floyd as the biggest band of all time according to "a points system that measured sales of their biggest album, the scale of their biggest headlining show and the total number of weeks spent on the UK album chart". "Rolling Stone" ranked them number 51 on their list of "The 100 Greatest Artists of All Time". VH1 ranked them number 18 in the list of the "100 Greatest Artists of All Time". Colin Larkin ranked Pink Floyd number 3 in his list of the 'Top 50 Artists of All Time', a ranking based on the cumulative votes for each artist's albums included in his "All Time Top 1000 Albums". In 2008, the head rock and pop critic of "The Guardian", Alexis Petridis, wrote that the band occupy a unique place in progressive rock, stating, "Thirty years on, prog is still persona non grata [...] Only Pink Floyd—never really a prog band, their penchant for long songs and 'concepts' notwithstanding—are permitted into the 100 best album lists." The writer Eric Olsen has called Pink Floyd "the most eccentric and experimental multi-platinum band of the album rock era".