If you're unfamiliar, the basic concept is that Regina Hall's character of Jordan gets a spell/curse put on her by a random little girl and she wakes up 13 years old again. The intent of the movie is that hilarity will ensure as Jordan has to navigate life as an adult trapped in a child's body. It's kind of like A Christmas Carol where adult Jordan is Scrooge and she gets a chance to re-learn a lesson that she didn't quite learn when she was young - that just because you were treated poorly as a child doesn't give you the right to treat people poorly when you're an adult and have money and power.
Personally, I'm not a huge Regina Hall fan. I didn't like her character in "Girls Trip" or this movie. Obviously, you're not supposed to like her character, but I suppose you're supposed to sympathize with her. In the end, I didn't really find that the case.
As a comedy, thankfully there were some funny parts where I laughed out loud. This was mostly thanks to Issa Rae who played adult Jordan's assistant, and Marsai Martin who played the young Jordan. There's one or two tiny heartfelt moments, but they don't involve the main character, just a side character named Isaac that I later learned actually has real talent and was cast as the voice of young Simba in Favreau's The Lion King.
Overall, I get what this movie was going for, but the execution was lacking and the writing could have been better. There was some tone issues where serious parts played more silly so therefore they didn't feel grounded in reality. A better utilization of sound would have helped as some scenes felt devoid of any background music at all. There were also moments that were supposed to play for physical comedy that just came off as mean spirited. Lastly, there were two scenes with a child flirting with an adult where the first one was tongue in cheek, but the second was kind of uncomfortable.