It's not the same as grading in class. In a way, I see a 1 as an F, 2 as D, 3 as C, 4 as B and 5 is perfect. So, you're right, it's a 4, maybe, sorta kinda. I reserve 4 for near perfect movies, though. This was pretty damned good but not GREAT GREAT GREAT but I'm upgrading to 4. I really like to leave myself room so the truly spectacular movies get grades that mean something. A 4, to me, is a pretty spectacular movie. Hardly any movies get 5.
How confusing was that?