there are a lot of great songs and collaborations on here, most notably with Dave Matthews, Rob Thomas, and Eric Clapton, who are people I have heard before and enjoyed.  Many collaborations are with "artists" who I hate or have no respect for (such as the pathetic rappers; rap is extremely overrated), which weakens the album overall in my book.  But there are great tunes, Carlos plays some great guitar, and it is a very celebratory fiesta album for modern times.  The sharp arrangements and production make this the much loved album that it is.