It has always been widely considered that the game play was often limited for age groups under that of adults and this expansion pack has worked hard to correct that with new options, interactions and actives, but I think how you play the game depends on how much you get from this expansion pack.
If you are someone who likes to develop their Sims to a high degree, focusing on one or two characters and not really interest in building a family or generational tree this expansion pack holds limited appeal.
On the other hand if you enjoy progressing your sims through their life and building countless families this expansion pack has alot of scope and something you should consider purchasing, It does add a considerable level of depth for the earlier stages of a Sims life which was absent.
Not to say there isnt new features for adults with the Stag/Hen parties being very entertaining and as you would imagine more fun items to purchase, chemistry set being a good one. But any expansion pack following Night life was being handed a tall order given how much it offered.
As a final verdict this is an expansion pack worth owning once its under 20 pound, how they can charge 30 pound for an expansion pack is nothing but greedy. Based on my earlier comments if you tend to focus on only 1-2 sims this is only a 3 stars addition to the series but if you do the whole family thing its 4 stars. Its good but not great.