I also use SQ Labs Inner Bar Ends, and am a fan. I love them for cruising, primarily, as the narrow grip stance is both more comfy and more aero, so it feels really efficient for me to get into little tuck and just reel off some miles.

EDIT: I should add, for clarity, that the SQ Labs units I use-- and pictured-- are the longer, more shapely, 410. I have 411R Carbons, but I don't use them because I don't like the shorter length and hollowed-out underside. Having a full bodied handle is more comfortable for me, though the carbon fiber units are very attractive for their lightness.