I've read some good things about Ameriglo sights for my edc S&W M&P Shield 9mm. ..bought the Shield with the cheapest 3-dot white sights S&W sells figuring I'd upgrade. But, wow, there are a lot of choices. These gotta be quick acquisition & work both in day & night. My eyes do well at longer distances but not as well up close. There's no shortage of opinions on any of the various brands--have considered the XS Big Dot & Trijicons--but right now am leaning toward Ameriglo. But can always change my mind if recommendations are right.