UncleFudd, that's a nice sight setup...very cool. I believe I will eventually try something like that out on my next personal service size pistol...it looks effective.
I've been around ghost ring sights, electrical and mechanical, from Eotech to track lock, fragile and sturdy, on shotguns, carbines, and SMG's, and for most people they work to fullest potential.
On aperture sights, in general, I've taught a whole bunch of people to fire the M16/M4. I always explain that your eyeball is round, your pupil is round, the aperture is round...hell the planet is round...so the shape of the aperture is no coincidence....if you just look through the hole your eyeball will naturally get it perfect...only if you try to outsmart the circle will you manage to mess up this utter simple system. Just always use the small hole for precise fire.
On CT style lasers....those are what in my job is called a technology answer to a tactical question...and tactical questions usually defeat technology in very embarrassing ways. Laser sights just make a complicated weapon even more difficult to master. Gadgets cannot replace fundamentals and discipline.