It has zero intuitive key bindings.
Also i swear that ctrl/tab/shift/alt should be kinda mapped opposite. This editor should be used only with Space-cadet keyboard from 70,80....
Seriously - learning 6502 assembly is easier than to graap those INSANELY bad keyboard layout.
That when I tried it, I was reading the best way to use it is to install plugins to make emacs behaves just like VIM.