We do it as three layers, Sauce, Noodles (usually Ziti), Cheese, repeat 3x so it is actually 9 layers. My favorite is one cheese level as roccato and provolone.
I top with a dusting of oregano.
Yeah, it is frighteningly good.
When the kids were young I taught them how to help me put it together, so it also has a social aspect.
Been a while, I need to throw one of these down soon.