I too was hesitant about it but the body hair is what really sold me. I like the idea of going through body changes. It adds some depth to the struggle that teens face. Speaking of face, acne, am I right? Anyway, so following them to school, interacting in their daily academia and molding them are fun.
A negative is all the prom! In my opinion, prom should be held way less frequently! Prom every weekend??? That takes away the significance of it. Of course, doing prom without seasons could be difficult if it wasn't just a Saturday thing because there would be no season to associate with. And you can't have high-school without prom.
Other than that, I really do enjoy this pack.
Remember, there will always be those that regret buying something. It's called Buyer's Remorse and it is a real thing. So my suggestion is listen to the why, not just the what. And, always wait when a new pack drops. There will always be bugs in the new pack since most often corporate wants them dropped quickly to get the return on investment, players are no longer just players, we've become unpaid (and worse we pay for) testers. So you have a 1k people (just a number example) buy the game, play the game, find the problems and in a perfect world, you then fix the game. The problem is, the rushed sale leads to more and more bugs not being caught before release.
And the devs are caught in the middle. Corporate says hurry up and release then players say hurry up and fix and devs get overly stressed. It's not a Sims thing, it's a gaming industry thing. Corporate-funded games cannot possibly be fun to work on. Sorry, ranting now.
But yeah, HSY is a fun pack.