What they got right: Only in a comic like this can you get away with things that should go in the "wrong" catagory. For example, why does a boarding school have Kryptonite in their mineral box anyway? How can all these new kids at once not feel odd. How does Belinda get admitted without Clark Kent or anyone else to sign her up, much less become captain of the cheerleading team in the course of a day? "Just ignore it and have fun" seems to be Landry's motto, and she succeeds. The addition of a third new girl in school as Linda's friend and roommate has some definate potential. (Especially when you consider Kara's introduction to Earth.)
What they got wrong: I would like to know if Belinda has super powers. She obviously knows Kara/Linda's situation, but she doesn't seem to share her powers any more than she does Supergirl's morals. Hopefully future issues will shed light on this.
Recommendation: This comic does for girls what Billy Batson does for boys. Take a famous DC character, use the Silver Age concept of writing stories that speak to kids's life concerns (mostly bullies, but in this comic's case, throw in fitting in), and make it fun. A nice change from current DC continuity. Obviously, I can't relate as well, but well enough to keep picking up the comic for now.