With a lesson of friendship and an idealism that may sound a little cheap, Kamen Rider Kuuga presents itself as a revitalization for the franchise after the death of its creator. With good fight scenes, great monsters, and a plot that is supported by its good casting (except Godai's sister, who acts very badly) Kuuga is certainly fun! In addition to having a much darker tone than those that came after him (Agito and so on). Perhaps Kuuga's big problem is his abrupt end or his too long episode count. Spoiling the series a little bit.
In addition, I strongly recommend it to anyone who wants to start watching Raiders.