This is okay if you're of an age and have an affection for the 90's/00's car scene.
Tinie Tempah sounds very wooden for the vast majority of the time although manages to convey the impression that he's a bit interested in cars, Naomi Schiff is, well, Naomi Schiff (and the only reason I watched in the first place).
Editorially it's pretty rough, they use a lot of music of the era, but there's either waffling over the top of it or it's just a hint. I also feel more effort could've gone into the history of the cars featured, and it bugged me that they would highlight one car for the challenges and then use a completely different one often times, also they should have used stock versions in the vast majority of cases. The challenges are pretty naff, the only one that was any good is the episode 4 Hot Hatch one.
The ebay ad spots weren't as bad as you'd see on YouTube, but still felt awkward and clunky.
Overall I don't think the idea is terrible, however, the execution is pretty poor and a few tweaks (with a sledgehammer) could make it very good.
Finally, I *was* hoping to see Naomi screw some of the cars around a bit (she is an actual race driver, after all) but no, not so much.