It's intelligible and not tone-deaf, so its a W for KSI. He mimics every mumble rapper convention with ease, which isn't saying much, but again it is surprising how competent this record is, how low has the standard become? Other artists who pushed through from YouTube have made very credible careers since; (Biebs and Joji especially) But for KSI to walk into the rap sphere so easily is either a testament to his hustle or how fucking sad hip-hop's "pop" derivation of sound is, I'm going with the second because while this is astronomically better than expected its still fucking terrible.