I've watched this, it was fun but back then I didn't really pay attention to the story, I just liked watching the fight.

So it's a rewatch, surprisingly it's pretty good, has many characters & riders with various personalities, either it's kamen rider or just normal people, they're really make this series entertaining, there are few episodes that makes me laugh a lot. The story was good imo, with the battle royale concept, it's really afford it's way to be so intense till the last eps; at some point I realize that the riders probably could all die because they're must fight each other until only one rider left to live, it feels so suffocating. The world building is also pretty good, especially with the Mirror World which has its own rules.

That's all I want to say, it was fun.