The album was praised for integrating musical styles from several aspects of the band's career.[3][4] The album gained the band seven Grammy Award nominations in 2007 including an award for Best Rock Album and one for Best Boxed or Special Limited Edition Package. Winning five out of seven Grammy Awards,[5] it was the most nominations that the band had garnered in its 24-year career. Rolling Stone has included the album on its list of Best Albums of the 2000s.[6] Kiedis attributed the album's success to less abrasive dynamics within the band, saying that the band's "chemistry, when it comes to writing, is better than ever. There was always a struggle to dominate lyrically. But we are now confident enough in who we are, so everybody feels more comfortable contributing more and more valuable, quality stuff."

Wikipedia