Summary: Joy, Sadness, Fear, Anger, and Envy are the key emotions inside one little girl named Riley.
It's not as adventuresome as something like Frozen, but it has its charming points.
Plot 3.5/5 - There's the story that's going on with Riley on the outside and what's going on inside her head. I think there's a good balance between the two, definitely more heavily weighted toward the inside.
Characters 3/5 - Cute but not as memorable as some Disney/Pixar characters.
Writing 4/5 - Decently done.
Humor 4/5 - I thing the funniest moments were the emotions inside the other people's heads (mom, dad, dog, cat).
Overall 4/5 - Worthwhile movie to see. You probably "get more" out of the story as an adult, but I'm sure kids will enjoy it too.