I'm glad I wasn't the only one that thought Kota's introduction was a deliberate homage to Godai's introduction in Kuuga. Though Odagiri still is better at the whole 'aloof-but-kind' air that Sano is trying to convey as Kota.
There was a lot of exposition in the first episode and it was really refreshing. I loved just being introduced to everyone and we just get a lot on who Kota is in the first episode, something interesting considering how in the past we haven't really gotten a lot of backstory on the protagonists usually until the middle of the series. Hell, we didn't even know much about Godai's past until Episode 11 or so where he finally learned his Rider Kick against Zu-Zain Da.
Even the fight scene was reminiscent of Kuuga from the high angles on top of a high building, and the whole area that they fought in was the exact same place as Kuuga's battle with the Ginoga clone.
The opening scene was cool, the opening credits seem kinda lame honestly, but the song makes up for it. I also loved the CGI with the alternate dimension where the Invass is from. Plus the Yggdrasil corporation building is very cool. Very Smart Brain-esque and I love how it's built in the shape of a tree.
The mysterious girl is already giving me Koyomi vibes so hopefully it doesn't turn out that way.
And Guu-san is the radio DJ? How cool! Go Guu-san!