As far as I know, this anime has an unusual aspect: the voice actress of the main character also performs in a real-life band with the same name. Because of that, the anime also carries the responsibility of attracting viewers to the band's offline activities. This project seems to have achieved good commercial results in Japan, Korea, and China. As for the long-term potential of this model, I can't say for sure.
Back to the anime: the animation uses a large amount of 3D modeling, but it's crafted to resemble a traditional 2D style. I think both the backgrounds and the character models are of high quality. The static shots are beautiful, though some character movements feel a bit odd compared to hand-drawn animation — but it's something you get used to quickly. Overall, I'd give the animation a 8/10.
As for the music, considering this is a band-themed anime—complete with a real band performing live concerts—I think the soundtrack deserves an 8/10.
The story is basically what the synopsis describes: several girls disband their band, then form new ones and eventually succeed on stage. There's not much more to it. The narrative focus might be on depicting the complicated"politics"among the girls. I'd rate the story 4/10.
In terms of character writing, it feels like the show tried too hard to highlight distinctions between characters, which sometimes makes them go overboard. For example, Taki occasionally comes off as borderline bullying her teammates, and Soyo sometimes feels cold and emotionless. I'd give the characters a 4/10.
I don't think this anime aims to deliver any particular value system; it's mainly trying to portray the friendship and emotional struggles of teenage girls. A 4/10 seems reasonable.
Overall, thanks to its attractive character designs, beautiful visuals, and plenty of band performance scenes, I finished the series in just two days. I genuinely enjoyed it, and if you happen to have some free time, it's worth watching.