Bought it, tried it, love it!
First and foremost. I don't work, or resell for See All Open Sight. I'm a consumer just like you. I plink at paper targets, and analyze why my shots groups are this or that. To put this into perspective, ask yourself if the hand and eye coordination is not what it used to be, or you're training to be consistent with iron sights? Also if progressive lens means something to you? (Damn progressives they ruin everything!)
Went to the range and took the time to zero it to 25 yards (or 75 feet), free hand; just me, stance, grip and trigger pull. The results were tight shot groups, on or damn near close to bullseye. I'm not saying this sight will fix your problems. But it certainly took the guess work out where the problems was at for me.
The reality: If you shoot with one eye closed and don't want to change that habit, don't bother. If you must see the target through the sight, with your one eye, don't bother. If you expect to have quick acquisitions on a target without (re)training, don't bother.
But for those of you who are receptive, and the over compensation of your youth is now lost to time, this sight might just be what you need.
I'm so convinced, bought a 2nd one to use on my dry fire pistol.
Glock 17 and 19.