Not a good watch, probably won't watch again, and can't recommend unless you're obsessed Vanessa Hudgens or the first movie / Freaky Friday tropes.
Look, Vanessa Hudgens does a good job working 3 times as hard for the same paycheck, but the story is a mess. The characters literally have discussions about how they don't know what's going on anymore.
The addition of this cousin undercuts the original movie's concept that it's amazing that someone else could look just like her. It is also barely amusing.
Where the first was "Freaky Friday" meets "princess diaries", this folds in "The Hustle" to add a criminal element, but like big crime: kidnapping and international affairs.
It is a very specific band of fans that are going to love this. It's not like there isn't anything to love, but the big selling point is the worst thing about the movie: it actually would have been good if they had the confidence to just do a simple switch again.