First rapper was tight....lol. Sounds kinda like.....umm.....nevermind
Second rapper had a hollow sound. Flow was a little shakey at a point or two, but was ok overall.
Third rapper was as tight as the first one!!!! LOL.......nice drop Phenom
I think the problem was that you didn't sound as authentic as the rest of the track....keep working on it though, you can only get better....