It's not bad, I guess ... though it's not TOP quality, as far as rap goes, IMO. I haven't listened to very much, of course, but there are some other "Christian" rappers who are better, IMO. He doesn't seem to have too much material on his channel, so perhaps it takes more practice.
I think the question is whether rapping is compatible with Traditional Catholicism. Obviously it's not Classical music, and there are negative associations with rap culture.
I'm not sure. I don't think there's too much harm in it as long as he keeps its clean. It's almost more like poetry with a strong beat. Poetry inherently has to have some kind of rhythm to it, and the raps has a strange sense of blending the rhythm of the music and the rhythm / cadence of the words.
I look at his latest, from about 3 weeks ago, and the message is about Saturday afternoon Confessions being too short, so by "Traditional" Catholic, I'm sensing more Motarian. He did cite St. Leonard regarding the fewness of the saved.