The best thing I can say about it is it fleshes out teens.
Before my teens would go to school, come home and do homework and maybe work on skill points. Their only free time was the weekends.
Now I can choose to spend more time with them during the week and often they go hang out at the Boba Tea shop after school and other teens show up there too.
There are a bunch of unfortunate game play decisions for high school though and I had to use mods to make it better.
My favorite is a mod that allows me to decided what other teens show up at high school instead of generic townies.