I am looking for some new sights. Right now I have the Warren Tactical Sights on my Glock 22. I don't really care for the Warrens. I have been looking at the HD Sights or the Ameriglo Spartan Sights. Long story short, I am finding out that I shoot better with the square rear sight post than a U shape rear post. I keep hearing about the Heinie Sight and I saw a video explaining how they work. I am thinking about trying them out. I wanted some feedback on the Heinie Straight Eight. Do you get points of aim and point of impact at 25 yards? Are easy to pick up in low light or no light conditions? Thanks for the fees back