Plus points: Created a best selling franchise, got so many people into/more knowledgeable of cars, gained recognition from actual car companies and don't just churn stuff out for the sake of making a quick buck.
Negatives: Ridiculous work ethics (living in your office for most of your year ain't great, let's be honest), vague communication with fans and stuck a bit in the 90s in terms of how they work (secrecy, going from the producer's single idea rather than seeing what others are doing, not outsourcing for efficiency, etc.)
Just meh overall.