Spa Day was my most favorite of my games up until I was finally able to purchase the other Gamepacks in 2018. For 4 years I wasn't allowed to purchase the Gamepacks because there was a Canadian band (red tape) to purchase Sims 4 gift cards & I didn't have an interact card to purchase online at the time.
My fave of Spa Day was the Wellness Skill that can eventually transport a sim from one location to another & they can float in mid air. Also, I loved the Massage Table, it could get a sim to give another sim the fertile for twins. So cool.