Animation-wise, this was well-made. There aren't any dead frames or horrible background art. It feels lively, really. And the character designs are consistent throughout the entire show. If there's one aspect that this movie excels in, it's the animation.
Now, as someone who plays the game (already at level 72 btw), I can say that the songs are catchy. But then again, it might be nostalgia talking, as most of these songs are played in-game as background music for minigames. So the music is entirely subjective in this case.
The characters are... well, if you've seen one idol show, you've basically seen every character trope, and 7th sisters is no exception. What I will give it props for is how characters have their own dynamic from one another. So pairings or OTPs are out of the question. And thank goodness for that, cuz I don't think I can take any more shippings in every franchise.
Did I enjoy it? Well, I did, but mostly because of nostalgia. Most people who aren't familiar with the franchise will probably just brush it off. But I assure you, without spoiling anything, that it tackles a subject in the idol industry that is a scary thought but is also an inevitability.
Overall, it's a good movie, despite it being too late for the party. If you like idol shows, or waifus in general (cuz there's a lot of them here, and I haven't even mentioned the rivals, originals, and time-skip idols), then give this one a shot. It's not mind-boggling, but it's an interesting watch nonetheless.
