I saw that sight last year. Looks interesting, I would be interested to try one out. My experience with red dots on pistols is that it's easy to lose the dot, I would assume this might help in that regard by providing an anchor for the eye.

I've recently put a Trijicon RMR on my G19 that cowitnesses with a set of suppressor height sights. The front sight is an aid to the eye while bringing the gun up making it easy to then transition to the red dot. Otherwise, it's easy to lose the frame of reference and the dot.