It’s my all-time favorite Blender hotkey; but I agree with Dwayne, that the Active Tool is probably easier.
Important is, that the hotkey (can of course also be put in the Q menu, if you want), uses the View as shear axes and you only get two (View X and View Y).
The Active Tool gives you 6 axes at once according to the Transform Orientation (which you can set to View to get the similar behavior as the hotkey version).
I think the Active Tool is a lot more intuitive to use (but both can get the same things done). I still always use the hotkey, because the Active Tools didn’t exist yet, when I learned to Shear in Blender (and it keeps my fingers flexible).