I have these installed on a Glock 23. I am very happy with them and the daytime performance of the Fiber Optics is impressive. The glow from the tritium at night is not quite as bright as the other night sites I have, possibly a small loss of light through the FO(?). I can't really define that as a complaint because they work just fine. I might try yellow front and green rears if i were using them mostly at night
Pros: flexibility for day or night, in good light very bright FO
Cons: expensive, not the brighest at night.
This review was written in the old system and had content requirements that are different than reviews written today.