“Spark it up, because the best from the bong is gathered here. The stoner hip-hop kings cull a bumper crop of top-shelf audio chronic.”
— Hustler Magazine
"There's something here for every KMK fanatic. And with appearances by Cypress Hill's Sen Dog, Insane Clown Posse and underground phenomenon Tech N9ne, the hip-hop world is well represented. Yeah, yeah, I know it's cliche, but LONG LIVE THE KINGS."
— Skunk Magazine
"Cloud Nine, like the previous eight Kottonmouth Kings' albums, doesn't disappoint. The second track, "Livin' Proof," is classic KMKs "rip-hop," their cross of hip-hop with punk-hardcore, and the next one, "Marijuana," represents what the KMKs are all about."
"If you've ever had any prior opinion about the Kottonmouth Kings, go pick up this album. Agree with their point of views or not (why wouldn't you?), they have a very solid album with "Cloud 9". I was opening reluctant about them, but with this one they've made a believer out of me."
— 411 Mania
"Kottonmouth Kings 'Cloud Nine' celebrates feeling good in the face of that intensity, why the hell not?
— Revolt In Style
"The punk/hip-hop crossover game is one that is being perfected with a California twist, hand rolled and delivered to you by the Kottonmouth Kings!"
"Mothers cringe and rebuke the kids who listen to their music. But Kottonmouth Kings (KMK) are more than music; they are the creators of a lifestyle."
— Skope Magazine
“In the war of the independents, no one can boast victory like the Kottonmouth Kings.”
— Baktopia Magazine
"Punk numbers that sound like the Beastie Boys if they never grew up and some good, hard-hitting hip-hop"
— All Music Guide
“Rock-rap hybrids like this are always interesting for an open-minded fan, because the combination of the two genres always have the potential for something truly special.”
— Rap Reviews