"I Maniaci" is a highly uneven film that is still well worth seeing. It's an Italian film made up of lots of little skits. Some work, some do not. But they come so quickly that even with the lesser ones, you know a good one is soon coming. However, I did notice that the poorest vignettes occurred near the beginning, so if you find your attention waning--hold on--it will get better.
Of the skits, my favorites were the one about the REALLY obnoxious couple who visit a monastery as well as the hitchhiker. They were particularly funny though the rest are generally good. In the last one, however, they managed to make a funny skit--but a seriously flawed one where there is TONS of mugging and overacting.
Overall, a very good film that is light and simple entertainment. Just turn off your brain and enjoy.