I buddy of mine had these sites installed on his FS 9mm M&P. I have seen them in the gun rags and such, but this was my first experience with them. They are ugly to look at on the gun and seemed cheesy in concept, but they work. The speed of the site picture is very fast. I was also impressed with accuracy if you line up the lines correctly. My experience with over sized sites like that has been faster site picture (compared say to your typical three dot site set up) at the expense of accuracy at longer distances. For HD/SD gun, it’s a fair trade off I think, but these sites seem to have solved that issue, at least they did for me. But egads they are ugly to look at.
I don’t get much from that vid one way or another. What I can say, they worked as claimed when I tried them. They have interchangeable inserts of different colors. Supposed to be very good on low light also. No low light use on my end, but the design and size works for fast site pick up and accuracy, especially for those with aging eyes I’d suspect. This seems to give a better idea of the site picture. Will I run out any buy them? No, but I think they could be a good option for some.