Fine! I'll say it:
A story from very long ago and actually kind of more applicable now. Years ago, emacs was there, as was vi. We used emacs, there was a version on our systems known as unipress emacs. Who knows, the manufacturer? Whatever, but what it included, or someone in our system mapped out was keypad sequences for the most normal editor activities like select region, cut, copy, paste, and etc. And there was a one page help guide that everyone had over their terminals showing the numeric keypad mappings as well as the mouse actions which were customized. Again, I don't know if these were local customizations or indicative of the editor.
Being a typist, I learned the actual standard emacs key sequences.
Meanwhile we had two engineers who argued, loudly, and for the sake of busting each other's backsides, about the differences in the two methods. You work a lot collaboratively, but usually one person is driving the terminal and inevitably if it was one of these two, you'd get "No! Mouse Left -> Right Click!!!" "Nah-Ah! ESC-w, CTRL-y!!!!" Sometimes comical, sometimes "Gee, can we get some work done guys?"
Well, you can use the standard mappings, and you can customize. I do mostly the standard mappings but customize a few items.
I don't know how good/bad it is for mouse based users. I'm a typist, and I've always been very happy with emacs. Realizing now that it's not that I dislike things like gedit, but I suspect that there are some actions which are near impossible via keyboard where you have to use the mouse in some of the other editors. For emacs you pretty much can never use the mouse all the time. That's truly what I personally like about it.