Its definitely not the best anime out there. Its not something you watch for an absolutely amazing plot and characters, which you closely analyze. Rather its one of those animes where you can turn off your brain and mindlessly consume (and forget about later on). Some of the songs were nice. The repeated intro is annoying. I wouldn't recommend this show if you are looking for something nuanced and developed.
The plot is pretty straight forward. The main characters as singers arent that special, something that becomes obvious when other artists are introduced. But somehow, with the power of being anime mcs everyone thinks they are. AS far as character development goes, Angela is the only one. The rest of the characters either do a 180 at the last moment (the antagonists) or stay consistent through out (the "good" characters). Which makes it the kind of anime that doesnt stay with you forever and is super forgettable.
(watch if you liked barbie and the diamond castle as a kid lol)