I think this show is either directed at teenagers, those who aren't far from their teenage years or those who are particularly reminiscent of their teenage years; simply because it can't be taken too realistically.
"Jane by design" details the life of a sixteen year old girl who is mistaken as an adult, and is given the opportunity to live both the life of a normal teenager and the life of a successful career woman. She doesn't pay rent but she earns a respectable salary, she doesn't have bills so she uses her money for clothes- it's essentially the best of both worlds. This show centres around a daydream that most high school "outcasts" have had at one point; that of being given the opportunity to break free from the mold and prove to every popular kid that even the outcasts matter.
This show can't be taken too literally. It is very surreal (as a situation such as Jane's would never go unnoticed), perhaps a little stereotyped and generally tailor made for the modern day teenager. It has Iphones, heels and a Katy Perry soundtrack- so if Gossip girl or 90210 simply aren't to your liking, this probably won't be either. But as a teenage girl, I find it adds much needed sustenance to my own daydreams and perhaps a little bit of healthy positivism to my outlook on life.