I just came back.
The actor Tarence Howard (i think it's his name) was great.
Not sure if this part is somewhat of a spoiler but....
you gotta admit the first beat the white guy made was insane though... lol
Else from that, some parts we're stupid, but as a general I liked it, for the ending I guess they wanted to show how it is sometimes and it's not always from rags to riches without a hitch.
edit: I just checked the soundtrack listing, the actor actually rapped the real thing. The song is called 'Whoop That Trick' lol