The Despicable Me 3 is a childrens’ movie and you should see it like one.
The plot if the movie is that, Gru is now a agent in anti-villian squad with Lucy. He comes across a villian named Blathazar Bratt who steal a diamond. Gru fails to catch him and is removed from the agency. Then he discover he has a twin brother, Dru. After knowing their history. Gru decides to get his job back by fighting Bratt with the help of Dru and getting the diamond back. The events that happen in between are funny.
The music is well suited for the scenes. They have choosen the right tracks I would say.
The movie does have a little slow or predicting moments. It does go a little overboard in a few scenes. But then again it is childrens’ movie and an adult should not look for logic in it.
The scene where the minions are living a mafia gangster’s life is the funniest.