Contrived as they come and suffers from that appalling affliction most programmes do whereby the tell you what they are going to show you, retell it before the break then retell what they've shown you after each break, ad nauseum.
I must admit I do watch it, because I like cars, but I record it and can condense an hour's worth of them dicking around into fifteen minutes of viewing.
I'm sure most true restorers would be horrified with the shortcuts they take: incorrect trim, '80s rooflights left in place out of laziness, etc.