Not really for kids I started watching this series with my 5yo daughter. She loved all the pink and pretty things. However quite early on turned it off and watched the next few episodes by myself.
I note that the main characters are 12yo girls (but look younger) they are quite obsessed over weight and mention a number of times, over a number of episodes the importance of limiting food intake. (For example one episode is about an ice skater who they explain must limit her food so she is light enough for jumps, this is presented as a good thing).
I can overlook this as an adult and enjoy the animation, but would definitely not want my 5yo latching onto those ideas.
I also note the main characters obsession with a boy who appears significantly older than her, with some hints after a few episodes that he might also like one of the younger girls. This again is presented as a good thing which comes across as quite weird.