I have to admit, I'm impressed. Knowing this game, especially since this is a completely free add-on, I was totally expecting them to just add a few recolours, maybe a wellness-related aspiration, and call it a day. Instead they've given us three wellness aspirations, wellness for children, the ability to make money with wellness, new CAS and BB items in addition to the recolours, an entire new CAS and gameplay aspect with the nails, and cross compatibility with other DLC such as Get Famous, Parenthood and occult packs.
The only thing that disappoints me is that while children can now participate in wellness, they don't build the actual skill, meaning that they probably won't reap the benefits such as teleporting either. But all the other stuff we're getting for free more than makes up for that.