'Soulfly' was a great debut album. With its multiple guest artists, excellent production, twists, and aggressive vocals the band (and Max Cavalera himself) is known for, it showed that Max wasn't gonna quit making good music after leaving Sepultura. 'Primitive' continues the trend, so those looking for more in-your-face nu metal shouldn't be disappointed. The tribal drumming and Brazilian experimentation is still there, and Max's vocals are as aggressive as ever. What sets this album apart from Soulfly's other work, however, is its extremely familiar and unexpected guests. The album's second track, 'Pain', features another appearance from Chino Moreno of Deftones, who was also on the band's first album. 'Jumpdaf*ckup' is one of the album's highlights, as it features Corey Taylor of Slipknot and Stone Sour performing the verses of the song. His unquestionable voice dominates the track in an almost rap-like vocal style, something neither Slipknot nor Stone Sour usually does. 'Terrorist' features Tom Araya, vocalist for the acclaimed thrash metal band Slayer. But what really grabbed me was the duet with Sean Lennon, the son of John Lennon from The Beatles. Sean's voice is pretty much identical to his father's, so you may think John himself was on the song. It sounds like 'the Beatles meets metal', as it has that groove the Beatles are known for. The song is surprisingly great, and is something you have to hear to believe. Soulfly still hasn't disappointed with this album. Get it if you like metal.