With movie franchises, generally people tend to think the first film in the series is the best one, with sequels ever more likely to decrease in quality with notable exceptions. With coasters this is usually the opposite with the first ride of a kind made by a manufacturer being average or simply bad and the company improving afterwards. However sometimes, a manufacturer tries its hand on a new concept and never manages to top it of even years later no matter how good their later installments are. Not only their "first" was really good, it still stands out as their best yet Kumba is an example of First Installement Wins I believe. First big B&M looper and many think it is still the best because of its intensity and gorgeous landscaping. Magnum XL-200 was the debut Hypercoaster for Arrow and while it receives mixed opinions nowadays, its reception is arguably much better than the Desperado/Big One/Titan V follow ups. It's odd to think that their experimental design turned out to be their best effort! Do you have more examples of successful coaster first tries in mind?