Depends on what you are looking for Chappie is not Terminator, robot out to get the world, bang, bang, special effects left, right and centre.
Chappie has a plot, character development, a being you can actually feel for. It shows the problem mankind (sorry, person-kind) will have when AI become aware. It's much like District 9, it shows us a problem that we will have to deal with.
If you want a movie that will make you think, and shed a few tears, see Chappie. Otherwise, save your money and watch Avengers or play Bloodborne.
Much is made of Die Antwoord as a negative factor in the film. If anything, I thought that Yolandi was a very touching mother figure, think Chappie in the bed being read to.
And Ninja starting out being all bad ass, and then showing his love for Yolandi and coming around to the good.
All in all, a movie I would, and will, see again.