Although I am not interested in cars too much I enjoyed the show. At first it was annoying for me that cars were made in CGI (only for few moments) but I got used to it. The show starts a bit slowly, not to say boringly but the plot quickly develops and action comes by in the first episode. I didn't think that anime about cars could be this interesting. I can't agree with one of the reviewers that anyone can watch it, even someone who doesn't like anime or cars because this anime isn't good enough to get round somebody to "japanese cartoons".
Nonetheless it's just ideal title for people who saw almost everything and who wants some change from popular and boring shows (for ex. Naruto ). Just try to watch first episode and maybe You will like it like I did.