Well, I took the plunge and bought myself an Ego with the Q-A strap when I was stateside last month. Since it's my first messenger bag it took some getting used to but, all in all I'm pleased with it. The one thing I would like to see is changed is the thickness of the strap on the Q-A strap. There are times when I go to pick up the Ego I have to 'untwist' the strap. I feel if the strap were a bit thicker (stiffer) it wouldn't be so quick (easy) to 'twist'.
It's a minor complaint in an all around great bag and maybe it's just me (I do have a tendency to just throw (not place) my bag down).