I have a set from some years ago. Tried them for a few weeks; didn't find them particularly useful/helpful.

They are not bar-end substitutes at all. The idea: many folks riding flat bars find themselves 'resting' their palms on the tops of the grips, and so risk not having enough control. Hence these things: one can rest one's hands on the tops of the grips and hook one's thumbs on the TOGs so as to maintain control on the bars. If I might say so, not the same idea at all as the SQ Labs 'inner bar ends'. Those are, really, a kind of 'mini' aero bar. Equally of no interest to me, though others seem to like them.

I use Ergon grips (w/integrated bar ends) and found these (TOGs) pointless, for me. Others' experience might vary, of course.