Ichika, Hana, and Hikaru are all in the same seventy minute movie. That'll be good enough for some of you and was good enough for me. This movie isn't much different than a three-parter from the main Star Twinkle series, except it has better production quality and a few cures floating around from previous series. If you're enjoying the Star Twinkle series I don't see any reason why you wouldn't enjoy this movie. The fight scenes are really well animated relative to the series and you get some good character interactions out of it. The only thing that would have made it better is if based Kappard showed up.
Unfortunately I didn't have a twinkle stick so I had to use a flashlight when cheering on the Precure while watching. You could probably use a lighter or a glow wand too if you don't have a flashlight lying around. I'm sure your feelings will reach the Precure.