Authentic
What I like about GM is that he is real as in he's an actual fitter / mechanic so really knows what he's talking about.
Also owns a running Merlin which he had an accident with in the shed by removing the limiter and revving the nuts off it.
I rarely watch TV now as it's too dumbed down but this should be a good balance of entertainment and education - being perceived as intelligent or nerdy gets ridiculed.