It's a female-audience rhythm game, and like all the others the gameplay is a bit subpar/simple compared to anything made for male audiences (such as the iDOLM@STER mobile games, bandori, llsif, ect.) I think it's a few steps above something like SideM LOS, but it's still not as good as it could be gameplay-wise, and it's disappointing seeing this happen over and over again for otome games. It's like they don't think their audience is capable of enjoying difficult beatmaps.
The 3D models and art look great (in my opinion), and the main story is fully voiced (it seems like card stories are not, but i'm not sure on anything else). Choreography is nice and you can unlock extra outfits for your boys! There's also a pretty diverse music selection, but there's only about 7 songs right now and idk how quickly they'll add more :/
I think it's worth trying but I have no idea if I'll personally stick to it.