i agree with blackdown, the eye of the tiger mixtape has really raised the bar in terms of songwriting, production and musicality. even if some of the rnb stuff is a little cringey, it's all very well done for what it is. mixtapes are allowed to have rnb on them, there's not some unwritten rule that says all the underground stuff has to be dark and avant-garde. in the states even big gangsta rap mixtape DJ's like Envy will put out rnb tapes. i generally prefer more upfront hardcore stuff but you can tell that true tiger are committed to their ideas, the vocal elements feel integral to their stuff rather than tacked on.
re: logan's comment, OTM. ghetto has got skills and lyrics but when i listen to that mixtape it feels kind of directionless, not to mention horribly mastered and engineered. he needs a good producer to help him shape some of his ideas.