Whether you like this movie depends solely on whether or not you like Ciara Bravo.
First, the movie; it's a silly movie about a family (appropriately named Murphy - as in Murphy's Law everything that can go wrong will) who are cursed with bad luck. The family has managed to live with it. The father has a career as an appliance tester - he can easily cause any appliance to malfunction. The little brother is known for his devastating skateboard wipeouts and is semi- famous from youtube videos. But Ciara's character hasn't made peace with the curse, and she is determined to somehow overturn the curse. Needless to say, her attempts to overturn the curse result in a series of comical mishaps.
She also has a love interest in the story which to me is kind of creepy because she's so young.
But the main character is Ciara Bravo, and this movie depends on her. To me, she's very likable. In fact, I'm hoping she gets a few more major roles before she turns 20 and turns into the next LIndsay or Amanda.