I'm an older guy and my eyes aren't what they were. I have the XS sites on my Hi Power.
I love the big front sight for combat ahooting. That thing looks like a white bowling ball.
The rear sights are the problem. It's not a notch. It's a shallow V with a narrow vertical white line in the center.
For me it's no good for target shooting. Also the sight picture XS recommends is the front sight Covers the POA.
I've spent 40+ years doing the POA at the 6 o
clock of the target.
As for the company video. I'm reasonably sure the guy shooting has spent hours and thousands of rounds in practice to get to that level. He probably doesn't even need sights.
Try to find somebody that has the XS sites and try them. There are people that love them.